Papers - OKAZAKI Naonobu
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Optimal Weighted Voting-Based Collaborated Malware Detection for Zero-Day Malware: A Case Study on VirusTotal and MalwareBazaar Reviewed
Naonobu Okazaki, Shotaro Usuzaki, Tsubasa Waki, Hyoga Kawagoe, Mirang Park, Hisaaki Yamaba and Kentaro Aburada
Future Internet 16 ( 8 ) 259 2024.7
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/fi16080259
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Usability improvement in color constancy CAPTCHA Reviewed
Shotaro Usuzaki, Wang Yihan, Kentaro Aburada, Hisaaki Yamaba, Kayoko Takatsuka, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
IEICE Communications Express 2024.6
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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プロジェクト・スケジュールの遅延リスク分析のための手法の開発 Reviewed
高塚佳代子, 佐藤知一, 油田健太郎, 岡崎直宣
化学工学論文集 49 ( 6 ) 159 - 165 2023.11
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
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Takatsuka Kayoko, Nagatomo Yoki, Uchida Noriyuki, Ikeda Takuya, Mukunoki Masayuki, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 10 ( 1 ) 17 - 24 2023.10
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：ALife Robotics Corporation Ltd.
This study aimed to reduce the effect of the examining environment on accuracy by using an eye movement detection system, a VR head-mounted display. We reproduced the inspection environment in a virtual reality environment and performed the cover test, a basic inspection technique for tropia and phoria. We then developed a system that uses eye data collected by eye tracking to detect the directions and magnitudes of eye misalignment. The Maddox method, an existing testing procedure, was used to verify the accuracy. We have confirmed its effectiveness in detecting the directions and magnitudes of horizontal eye misalignment.
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Development of keypads which use colors or shapes to prevent shoulder surfing Reviewed
Ryo Masuzawa, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Artificial Life and Robotics 2023.8
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Artificial Life and Robotics
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Tsunami evacuation simulation considering road width in Aoshima district Reviewed
Keita Nabeyama, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama & Naonobu Okazaki
Artificial Life and Robotics 2023.7
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Artificial Life and Robotics
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Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama and Naonobu Okazaki
Agriculture 13 ( 3 ) 627 - 645 2023.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Artificial Life and Robotics
Most of the small-scale farmers in Tanzania can’t afford to buy quality agricultural inputs (fertilizers and seeds), therefore the Tanzanian government issues paper-based subsidy vouchers to farmers for buying the inputs at half price. However, challenges like misuse of the vouchers by some government officials (stealing and favoritism in allocation) and lack of trust (difficulty of verifying vouchers’ authenticity) have resulted into low crop productivity for the farmers and loss of government funds. To address this, we have developed agricultural input voucher system which stores and allocates digital subsidy vouchers to farmers in the Hyperledger Fabric blockchain network whose features like hashing and digital signature prevent misuse and ensure trust of the vouchers. Farmers access the digital vouchers through Short Message Service (SMS) in their mobile phones. Evaluation reveals that, the developed system is effective and meets performance demands of Tanzanian farmers. Also, Raft has better performance than Kafka consensus protocol.
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Development of Methods for Project Schedule Delay Risk Analysis Reviewed
Takatsuka Kayoko, Sato Tomoichi, Aburada Kentaro, Okazaki Naonobu
KAGAKU KOGAKU RONBUNSHU 49 ( 6 ) 159 - 165 2023
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan
Since introducing the project management technique “earned value management” in the 1970s, planning and schedule management that balances the three factors of process, resources, and cost are now possible. However, delay risk has increased over the years because of the large-scale scope and changes in the surrounding environment. Therefore, besides the above three factors, preparation and management regarding delay risk are critical. However, many projects rely on the experience and intuition of directors to monitor risk. This study develops a project schedule management mechanism and system that analyzes delay risk besides processes, resources, and costs. A schedule network generation unit with multiple activities and a delay risk evaluation unit are included in the schedule management system to achieve this purpose. As a mechanism for managing delay risk, we propose a method that evaluates the margin (delay risk tolerance) of the total float of the schedule network that has a negative correlation with delay risk and a simple and accurate calculation method.
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Proposal for a blockchain based agricultural input voucher system Reviewed
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Artificial Life and Robotics 27 461 - 471 2022.1
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Artificial Life and Robotics
Most of the small-scale farmers in Tanzania can’t afford to buy quality agricultural inputs (fertilizers and seeds), therefore the Tanzanian government issues paper-based subsidy vouchers to farmers for buying the inputs at half price. However, challenges like misuse of the vouchers by some government officials (stealing and favoritism in allocation) and lack of trust (difficulty of verifying vouchers’ authenticity) have resulted into low crop productivity for the farmers and loss of government funds. To address this, we have developed agricultural input voucher system which stores and allocates digital subsidy vouchers to farmers in the Hyperledger Fabric blockchain network whose features like hashing and digital signature prevent misuse and ensure trust of the vouchers. Farmers access the digital vouchers through Short Message Service (SMS) in their mobile phones. Evaluation reveals that, the developed system is effective and meets performance demands of Tanzanian farmers. Also, Raft has better performance than Kafka consensus protocol.
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リレーアタック耐性とボット耐性の両立を目指したインタラクティブな動画CAPTCHAの提案と評価 Reviewed
油田健太郎, 臼崎翔太郎, 山場久昭, 片山徹郎, 椋木雅之, 朴美娘, 岡崎直宣
情報処理学会論文誌 62 ( 12 ) 1864 - 1878 2021.12
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
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スマートロックにおける二端末による機械学習を用いた歩行認証に関する研究 Reviewed
朴美娘, 渡辺一樹, 油田健太郎, 岡崎直宣
情報処理学会論文誌 62 ( 12 ) 2011 - 2023 2021.12
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
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Development of a System to Detect Eye Position Abnormality based on Eye-Tracking Reviewed
Noriyuki Uchida, Kayoko Takatuka, Hisaaki Yamaba, Masayuki Mukunoki, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 8 ( 3 ) 205 - 210 2021.12
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Proposal for a Crop Protection Information System for Rural Farmers in Tanzania Reviewed
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Agronomy 11 ( 12 ) 1 - 17 2021.11
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Proposal and Evaluation for Color Constancy CAPTCHA Invited Reviewed
Shotaro Usuzaki, Kentaro Aburada, Tetsuro Katayama, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
Journal of Artificial Life and Robotics, Springer 26 ( 3 ) 291 - 296 2021.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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主観的輪郭を用いた回転3Dテキスト型CAPTCHAの提案 Reviewed
臼崎翔太郎，油田健太郎，山場久昭，片山徹郎，椋木雅之，朴美娘，岡崎直宣
電子情報通信学会論文誌B J103-B ( 8 ) 332 - 343 2020.8
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
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On a user authentication methods to realize an authentication system using s-EMG Reviewed
Hisaaki Yamaba, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
International Journal of Grid and Utility Computing 11 ( 5 ) 725 - 734 2020.8
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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On a user authentication method to realise an authentication system using s-EMG Reviewed
Yamaba H., Usuzaki S., Takatsuka K., Aburada K., Katayama T., Park M., Okazaki N.
International Journal of Grid and Utility Computing 11 ( 5 ) 725 - 734 2020.8
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：International Journal of Grid and Utility Computing
To prevent shoulder-surfing attacks, we proposed a user authentication method using surface electromyogram (s-EMG) signals, which can be used to identify who generated the signals and which gestures were made. Our method uses a technique called 'pass-gesture', which refers to a series of hand gestures, to achieve s-EMG-based authentication. However, it is necessary to introduce computer programs that can recognise gestures from the s-EMG signals. In this paper, we propose two methods that can be used to compare s-EMG signals and determine whether they were made by the same gesture. One uses support vector machines (SVMs), and the other uses dynamic time warping. We also introduced an appropriate method for selecting the validation data used to train SVMs using correlation coefficients and cross-correlation functions. A series of experiments was carried out to confirm the performance of those proposed methods, and the effectiveness of the two methods was confirmed.
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An evaluation of the interactive video CAPTCHA method against automated attack Reviewed
Kentaro Aburada, Shotaro Usuzaki, Hisaaki Yamaba, Tetsuro Katayama, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
IEICE Communications Express 8 ( 12 ) 453 - 457 2019.12
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Implementation of CAPTCHA suitable for mobile devices Reviewed
Kentaro Aburada, Shotaro Usuzaki, Hisaaki Yamaba, Tetsuro Katayama, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
IEICE Communications Express 8 ( 12 ) 601 - 605 2019.12
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Personal Identification with Any Shift: Authentication method for smartwatches having shoulder-surfing resistance Reviewed
Makoto Nagatomo, Kazuki Watanabe, Kentaro Aburada, Naonobu Okazaki, Mirang Park
IEICE Communications Express 8 ( 12 ) 495 - 500 2019.12
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Evaluation of Ad-hoc Secure Device Pairing Method with Accelerometer and Camera Using Marker Reviewed
Makoto Nagatomo, Kentaro Aburada, Naonobu Okazaki, Mirang Park
International Journal of Networking and Computing 9 ( 2 ) 318 - 338 2019.7
Language：English Publishing type：Research paper (scientific journal)
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CHAMSIN: CaptcHA by caMouflaged StrINg Reviewed
Masayuki Mukunoki, Hisaaki Yamaba, Shotaro Usuzaki, Kentaro Aburada, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
IEICE Communications Express 8 ( 3 ) 55 - 60 2019.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Examination of Personal Authentication Method Achieving Shoulder-Surfing Resistance by Combining Mouse Operation and Number Matrix Reviewed
Kensuke Sakamoto, Makoto Nagatomo, Naonobu Okazaki, and Mirang Park
IEICE Communications Express 8 ( 3 ) 61 - 66 2019.3
Language：English Publishing type：Research paper (scientific journal)
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Use of access characteristics to distinguish legitimate user traffic from DDoS attack traffic Reviewed
Kentaro Aburada, Yuki Arikawa, Shotaro Usuzaki, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Artificial Life and Robotics 1 - 6 2019.1
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Artificial Life and Robotics
© 2019, International Society of Artificial Life and Robotics (ISAROB). Distributed denial of service attacks are a serious threat in the current information society, where the Internet plays an important role as infrastructure. We have been studying ways to mitigate these attacks using a method that distinguishes between legitimate users and attacks. Our previous method was not sufficient because it only analyzed access logs after the attack. In this study, we propose a new method that can distinguish between legitimate users and attacks while the services are running. When the IDS detects an attack, a quarantine server distinguishes legitimate users using access characteristics. The access characteristics are: (1) user follows links, (2) sender accessed a popular page, and (3) the sender’s current average transmission interval. Our experiments confirmed that the proposed method can distinguish between legitimate users and attacks.
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HMD-based Cover Test System for the Diagnosis of Ocular Malalignment Reviewed
Noriyuki Uchida, Kayoko Takatuka, Atsusi Nakazawa, Masayuki Mukunoki, Hisaaki Yamaba, Naonobu Okazaki
Journal of Artificial Life and Robotics, Springer 1 - 6 2019.1
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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An examination of the interactive video CAPTCHA method to resist relay attack Reviewed
Ryohei Tatsuda, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Masayuki Mukunoki, Mirang Park, and Naonobu Okazaki
IEICE Communications Express 7 ( 4 ) 136 - 141 2018.4
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Evaluation of Farmers Market Information System to Connect with Some Social Stakeholders Reviewed
Isakwisa Gaddy Tende, Shin-Ichiro Kubota, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Information Processing 26 247 - 256 2018.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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A Proposal of Highly Responsive Distributed Denial-of-Service Attacks Detection Using Real-Time Burst Detection Method Reviewed
Shotaro Usuzaki, Yuki Arikawa, Hisaaki Yamaba, Kentaro Aburada, Shin-ichiro Kubota, Mirang Park, Naonobu Okazaki
Journal of Information Processing 26 257 - 266 2018.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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On applying support vector machines to a user authentication method using surface electromyogram signals Reviewed
Hisaaki Yamaba, Tokiyoshi Kurogi, Kentaro Aburada, Shin-Ichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Artificial Life and Robotics 23 ( 1 ) 87 - 93 2018.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Implementation and User Testing of Personal Authentication Having Shoulder Surfing Resistance with Mouse Operations Reviewed
Makoto Nagatomo, Yoshihiro Kita, Kentaro Aburada, Naonobu Okazaki, Mirang Park
IEICE Communications Express 7 ( 3 ) 77 - 82 2018.3
Language：English Publishing type：Research paper (scientific journal)
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Novel Unsupervised SPITters Detection Scheme by Automatically Solving Unbalanced Situation Reviewed
Kentaroh Toyoda, Mirang Park, Naonobu Okazaki, Tomoaki Ohtsuki
IEEE ACCESS 5 6746 - 6756 2017.6
Language：English Publishing type：Research paper (scientific journal)
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口蹄疫感染地域において潜伏期にある感染農場検出のための数理的手法の開発 Reviewed
高塚佳代子, 関口敏, 山場久昭, 久保田真一郎, 岡崎直宣
化学工学論文集 43 ( 2 ) 117 - 122 2017.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Evaluation of feature values of surface electromyograms for user authentication on mobile devices Reviewed
Hisaaki Yamaba, Akitoshi Kurogi, Shin-Ichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Journal of Artificial Life and Robotics, Springer 22 ( 1 ) 108 - 112 2017.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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（推薦論文）Winnyネットワークにおけるクラスタリングを用いたインデックスポイゾニングシステムの実装と評価 Invited Reviewed
油田健太郎, 山場久昭, 片山徹郎, 朴美娘, 岡崎直宣
情報処理学会論文誌 56 ( 12 ) 2395 - 2405 2015.12
Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
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Countermeasure against fingerprinting attack in Tor by separated contents retrieval Reviewed
Naonobu Okazaki, Kentaroh Toyoda, Emiri Yokoyama, Hirofumi So, Tetsuro Katayama, and Mirang Park
IEICE Communications Express 4 ( 12 ) 370 - 375 2015.12
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Security Evaluation System for Android Applications Using User's Reviews and Permissions Reviewed
Naonobu Okazaki, Yoshihiro Kita, Kentaro Aburada, Mirang Park
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 3 ) 190 - 193 2015.12
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Proposal and Its Evaluation of Neighbors Based Routing for ad hoc networks Reviewed
Kentaro Aburada, Hisaaki Yamaba, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 2 ) 121 - 125 2015.9
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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An Authentication Method Independent of Tap Operation on the Touchscreen of a Mobile Device Reviewed
Hisaaki Yamaba, So Nagatomo, Kentaro Aburada, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 1 ) 60 - 63 2015.6
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Puzzle Authentication Method with Shoulder-surfing Attack Resistance and High-usability Reviewed
Yoshihiro Kita, Kentaro Aburada, Mirang Park, and Naonobu Okazaki
IEICE Communications Express 4 ( 3 ) 96 - 98 2015.3
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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文字認識攻撃に耐性をもつランダム妨害図形を用いた画像ベースCAPTCHA方式の提案 Reviewed
田村拓己，久保田真一郎，片山徹郎，油田健太郎，朴美娘，岡崎直宣
情報処理学会論文誌 56 ( 3 ) 808 - 818 2015.3
Authorship：Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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覗き見耐性を持つユーザ認証システムの実装と評価 Reviewed
喜多 義弘，岡崎 直宣，西村 広光，鳥井 秀幸，岡本 剛，朴 美娘
電子情報通信学会論文誌D J97-D ( 12 ) 1770 - 1784 2014.12
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Representation of human preference using folksonomy and the idea called concept Reviewed
Hisaaki Yamaba, Michihito Tanoue, Kayoko Takatsuka, Naonobu Okazaki and Shigeyuki Tomita
Journal of Artificial Life and Robotics, Springer 19 ( 3 ) 299 - 304 2014.11
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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On a serendipity-oriented recommender system based on folksonomy Reviewed
Hisaaki Yamaba, Michihito Tanoue, Kayoko Takatsuka, Naonobu Okazaki and Shigeyuki Tomita
Journal of Artificial Life and Robotics, Springer 18 ( 1-2 ) 89 - 94 2013.9
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Proposal and its Evaluation of a Shoulder-Surfng Attack Resistant Authentication Method: Secret Tap with Double Shift Reviewed
Yoshihiro Kita, Fumio Sugai, Mi Rang Park, Naonobu Okazaki
International Journal of Cyber-Security and Digital Forensics (IJCSDF) 2 ( 1 ) 48 - 55 2013.4
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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DDoS攻撃者によるIPトレースバックに対する妨害手法とその対策に関する検討 Reviewed
川端良樹，喜多義弘，山場久昭，油田健太郎，朴 美娘，片山徹郎，岡崎直宣
日本セキュリティ・マネジメント学会誌 26 ( 3 ) 15 - 32 2013.1
Authorship：Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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P2PストリーミングにおけるNAT越えを考慮した配信木構築手法の提案 Reviewed
山場 久昭，鮫島 慎治，池田 匡視，油田 健太郎，岡崎 直宣，冨田 重幸，朴 美娘
情報処理学会論文誌 53 ( 7 ) 1184 - 1890 2012.7
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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アドホックネットワークにおけるゾーン重複のない複数経路構築手法の提案と評価 Reviewed
油田 健太郎, 江藤 大, 岡崎 直宣, 朴 美娘
情報処理学会論文誌 53 ( 1 ) 336 - 341 2012.1
Language：Japanese Publishing type：Research paper (scientific journal)
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A New Light-path Setup Scheme for Dynamic Traffic in Ring-based Optical Networks Reviewed
Yusuke Sato, Nobuyuki Iwakawa, Mirang Park, Naonobu Okazaki
IEEJ Transactions on Electrical and Electronic Engineering 4 ( 5 ) 683 - 684 2009.9
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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動的マーキングを用いた効率的なネットワーク攻撃追跡手法の提案 Reviewed
古賀 勝寛, 岡崎 直宣, 渡邊 晃, 朴 美娘
電気学会論文誌C 129 ( 3 ) 532 - 544 2009.3
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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ABURADA Kentaro, KAWACHI Kosuke, OKAZAKI Naonobu, TOMITA Shigeyuki, PARK Mi Rang
The transactions of the Institute of Electronics, Information and Communication Engineers. B 92 ( 1 ) 88 - 97 2009.1
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
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センサネットワークにおける回帰分析を用いたノード位置推定手法の提案 Reviewed
油田 健太郎, 河内 康佑, 岡崎 直宣, 冨田 重幸, 朴 美娘
電子情報通信学会論文誌B 92-B ( 1 ) 88 - 97 2009.1
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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（推薦論文）データセントリックセンサネットワークにおける地理的位置情報を必要としないルーティング方式の提案と評価 Invited Reviewed
油田 健太郎, 佐藤 雄亮, 岡崎 直宣, 冨田 重幸, 朴 美娘
情報処理学会論文誌 49 ( 9 ) 3257 - 3270 2008.9
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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L2-based IPトレースバック方式の提案と実装 Reviewed
播磨 宏和, 伊藤 将志, 鈴木 秀和, 岡崎 直宣, 渡邊 晃
情報処理学会論文誌 49 ( 6 ) 2200 - 2211 2008.6
Language：Japanese Publishing type：Research paper (scientific journal)
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コネクションベース方式による踏み台攻撃検出手法の提案 Reviewed
竹尾 大輔, 伊藤 将志, 鈴木 秀和, 岡崎 直宣, 渡邊 晃
情報処理学会論文誌 48 ( 2 ) 644 - 655 2007.2
Language：Japanese Publishing type：Research paper (scientific journal)
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中継サーバを設けたセキュアな遠隔支援システムの開発と展開 Reviewed
三代沢 正, 厚井 裕司, 岡崎 直宣, 中谷 直司, 亀山 渉
情報処理学会論文誌 48 ( 2 ) 743 - 754 2007.2
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Proposal for a Practical Cipher Communication Protocol that Can Coexist with NAT and Firewalls Reviewed
共著者：S. Masuda, H. Suzuki, A. Watanabe, N. Okazaki
Lecture Notes in Computer Science, Information Networking, Advances in Data Communications and Wireless Networks, Springer, Volume 3961/2006, pp.713-722 3961 713 - 722 2006.11
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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ワイヤレスネットワークシステムにおけるシームレスユーザ認証方法に関する考察 Reviewed
朴 美娘, 岡崎 直宣, 馬場 義昌
情報処理学会論文誌 47 ( 7 ) 2058 - 2070 2006.7
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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NATやファイアウォールと共存できる暗号通信方式PCCOMの提案と実装 Reviewed
増田 真也, 鈴木 秀和, 岡崎 直宣, 渡邊 晃
情報処理学会論文誌 47 ( 7 ) 2258 - 2266 2006.7
Language：Japanese Publishing type：Research paper (scientific journal)
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ダイナミックグループ暗号通信のための鍵更新システムの提案と評価 Reviewed
朴 美娘, 岡崎 直宣, 妹尾 尚一郎
電子情報通信学会論文誌 J87-D1 ( 10 ) 907 - 919 2004.10
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of an Efficient Method for Re-construction of Path in the DoS Attacks (Network Security) Reviewed
OKAZAKI NAONOBU, KAWAMURA SHIGEHISA, PARK MIRANG
IPSJ Journal 44 ( 12 ) 3197 - 3201 2003.12
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
Recently, frequency of Denial of Service attacks are increased, and it is difficult to trace packets with incorrect, or "spoofed", source address. This paper discuss a method to trace flooding attacks by marking packets, and proposes an extended method to reduce the computation time for reconstruction of a path back to the attacker.
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ネットワークサービス不能攻撃の経路追跡手法の効率化に関する検討 Reviewed
共著者：岡崎直宣，河村栄寿，朴美娘
情報処理学会論文誌，44巻，12号，3197-3201頁 2003.12
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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An Efficient Method for Private Network Management Using IP Address Translation Reviewed
共著者：N. Okazaki, Y. Baba, T. Ideguchi, K. Nakata, M. R. Park, S. Seno
Trans. Institute of Electrical Engineers of Japan, Vol. 121-C, No. 10, pp.1562-1569 2001.10
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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イントラネット閉域通信グループの構築に適した安全な鍵配送方式とその運用管理方式 Reviewed
共著者：渡邊晃，岡崎直宣，朴美娘，井手口哲夫，笹瀬巌
電気学会論文誌C 121-C巻, 9号, 1429-1438頁 2001.9
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Realization Method of Flexible Private Network System Reviewed
共著者：N. Okazaki, M. R. Park, A. Watanabe, S. Seno, T. Ideguchi, M. Yabe
Trans. Institute of Electrical Engineers of Japan, Vol. 120-C, No. 8/9, pp.1242-1249 2000.8
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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同期データの伝送遅延時間特性を改善する改良型Timed Token Protocolの提案と評価 Reviewed
共著者：矢部正行，井手口哲夫，朴美娘，厚井裕司，岡崎直宣，白鳥 則郎
電気学会論文誌C 120-C巻, 5号, 731-739頁 2000.5
Language：Japanese Publishing type：Research paper (scientific journal)
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ASLA: Automatic Segmentation and Labeling by Deep Learning for Document Pictures Reviewed
Kakinoki Kanta, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 10 ( 4 ) 362 - 367 2024.9
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：ALife Robotics Corporation Ltd.
In this paper, we propose ASLA, a segmentation and label generation system for document pictures. ASLA reduces the duration needed for separating document pictures into areas and label generation. By using the application example, we have verified that ASLA operates properly. We have evaluated the usefulness of ASLA in regard to time and accuracy. We have assessed the efficacy of the rule-based area correction method. As a result, we have verified that ASLA is useful.
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Onaga Haruki, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 10 ( 4 ) 336 - 341 2024.9
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：ALife Robotics Corporation Ltd.
It is difficult for mobile application developers to understand the structure of large and complex mobile applications. To support iOS application development, we proposed SwiftDiagram: a visualization of the static structure of Swift source code, and demonstrated its usefulness. To further support them, this paper has implemented RAGESS(Real-time Automatic Generation of SwiftDiagram System), which is a software visualization tool. RAGESS performs static analysis on Swift source code and automatically generates the corresponding SwiftDiagram whenever the target project build succeeds.
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Analysis of Self Determination Factors for Continuance Intention on Online Learning Management System Reviewed
Saputra Mochamad Chandra, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu, Wicaksono Satrio Agung
Journal of Robotics, Networking and Artificial Life 10 ( 1 ) 91 - 95 2023.10
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：株式会社 ALife Robotics
The COVID-19 pandemic outbreak transformed the paradigm of the educational process. Many educational institutions, including the University, mainly the Faculty of Computer Science, Brawijaya University, have experienced success with learning through the Internet. The continuance intention factor for using an online learning management system is important to ensure learning sustainability. This study investigates continuance intention factor by using self determination model as a research model. The objective of this study is to find the factor factors affecting students' continuance intention toward online learning management systems. The proposed model is useful for investigating continuance intention factors. The study finds that intrinsic regulation, external regulation, identified regulation, and introjected regulation significantly positive impact on continuance intention in learning management systems. Finally, this study provides suggestions for the Faculty to improve the continuance intention of the student in using an online learning management system.
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Prototype of the Framework CATdd to Support Continuous Development in Test Driven Development Reviewed
Miyashita Takeaki, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 4 ( 1 ) 35 - 40 2023.9
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：株式会社 ALife Robotics
TDD is a development methodology to improve software quality. In this study, we prototype the framework CATdd (Continuous Automated Test Driven Development), which supports continuous development with TDD. CATdd reduces the time of implementation step in TDD by generating new source code that passes tests using LLM. CATdd maintains consistency with other source code in the project by using existing source code and related source code to prompt. As a result of the evaluation experiments, the time for the implementation step in TDD was reduced by 94% for a simple task and by 56% for another more complex task. In conclusion, CATdd is useful to support continuous development.
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Proposal of a Method to Generate Classes and Instance Variable Definitions in VDM++ Specification by Using Machine Learning Reviewed
Suga Kensuke, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Advances in Artificial Life Robotics 2 ( 4 ) 189 - 194 2022.10
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：株式会社 ALife Robotics
Writing VDM++ specifications is difficult. The existing method can automatically generate only type and constant definitions in VDM++ specification from natural language specification by using machine learning. This paper proposes a method to generate classes and instance variable definitions in VDM++ specification from natural language specification to improve the usefulness of the existing method. From the evaluation experiment by using F- values, it has been confirmed that the proposed method can improve the usefulness of the existing method.
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Proposal of Gamma Which Is a Messaging Platform for Spatial Data Reviewed
Ueda Takahiro, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 9 ( 2 ) 136 - 142 2022.10
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：株式会社 ALife Robotics
This paper proposes Gamma, which is a messaging platform for spatial data. Gamma uses distributed MQTT system for spatial data sharing, and this paper aims to improve the usefulness of distributed MQTT system. In the experiment, it has been found that Gamma can process more messages than a single MQTT broker. It is confirmed that Gamma achieves scalability by increasing the number of Gateways and distributed MQTT brokers. Furthermore, it is confirmed that the efficiency of the distributed MQTT system can be improved by setting the responsibility area of Gateways.
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Expansion of Application Scope and Addition of a Function for Operations into BWDM which is an Automatic Test Cases Generation Tool for VDM++ Specification Reviewed
Muto Takafumi, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 9 ( 3 ) 255 - 262 2022.10
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：株式会社 ALife Robotics
The use of the formal specification description language VDM++ in software design can eliminate ambiguity in the specification. However, software testing after implementation is necessary even if the design uses VDM++, but manually generating test cases is labor-intensive and time-consuming. Therefore, our laboratory developed BWDM, which is an automatic test case generation tool for VDM++ specifications. However, BWDM is not very useful because it has three problems about its narrow scope of application. This paper solves the three problems and improves the usefulness of BWDM by expanding the scope of application of VDM++ definitions and adding a function to generate test cases for object states. In addition, we conducted a comparison experiment with manual test case generation and confirmed that BWDM can reduce work time.
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Detection of Blob and Feature Envy Smells in a Class Diagram using Class's Features Reviewed
Priyambadha Bayu, Katayama Tetsuro, Kita Yoshihiro, Yamaba Hisaaki, Aburada Kentaro, Okazaki Naonobu
Journal of Robotics, Networking and Artificial Life 9 ( 1 ) 43 - 48 2022.8
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：株式会社 ALife Robotics
Measuring the quality of software design artifacts is difficult due to the limitation of information in the design phase. The class diagram is one of the design artifacts produced during the design phase. The syntactic and semantic information in the class is essential to consider in the measurement process. Smell detection uses class-related information to detect the smell as an indicator of a lack of quality. Several classifiers use all information related to the class to prove how informative it for the smell detection process. The smell types that are a concern in this research are Blob and Feature Envy. The experiment using three classifiers (j48, Multi-Layer Perceptron, and Naïve Bayes) confirms that Blob smell detection utilizes the information successfully. On the other hand, Feature Envy still needs more elaboration. The average true positive rate by the classifiers is about 80.67%.
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Measuring Redundancy Score for Test Suite Evaluation by Using Test Cases Matching Approach Reviewed
Mochamad Chandra Saputra, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life, Atlantis Press 8 ( 1 ) 1 - 5 2021.6
Language：English Publishing type：Research paper (scientific journal)
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Measuring Test Suite Reusability Based on the Usage Frequency and Coverage of Reused Test Cases Reviewed
Mochamad Chandra Saputra, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life, Atlantis Press 8 ( 1 ) 24 - 28 2021.6
Language：English Publishing type：Research paper (scientific journal)
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Extension of the Function to Ensure Real-time Traceability between UML Sequence Diagram and Java Source Code on RETUSS Reviewed
Kaoru Arima, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, and Naonobu Okazaki
Journal of Advances in Artificial Life Robotics (JAALR) 2 ( 1 ) 254 - 258 2021.6
Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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Utilizing the Similarity Meaning of Label in Class Cohesion Calculation Reviewed
Bayu Priyambadha, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 7 ( 4 ) 270 - 274 2021.3
Language：English Publishing type：Research paper (scientific journal)
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Mochamad Chandra Saputra, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Advances in Artificial Life Robotics (JAALR) 1 ( 4 ) 186 - 191 2021.3
Language：English Publishing type：Research paper (scientific journal)
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Proposal of an Algorithm to Generate VDM++ Specification Based on its Grammar by Using Word Lists Extracted from the Natural Language Specification Reviewed
Tetsuro Katayama, Yasuhiro Shigyo, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 7 ( 3 ) 165 - 169 2020.12
Language：English Publishing type：Research paper (scientific journal)
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FMD-VS: A virtual sensor to index FMD virus scattering Reviewed
Kayoko Takatsuka, Satoshi Sekiguchi, Hisaaki Yamaba, Kentaro Aburada, Masayuki Mukunoki, Naonobu Okazaki
PLoS ONE 15 ( 9 ) 1 - 25 2020.9
Language：English Publishing type：Research paper (scientific journal)
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Application of Pairwise Testing into BWDM which is a Test Case Generation Tool for the VDM++ Specification Reviewed
Tetsuro Katayama, Futa Hirakoba, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 6 ( 3 ) 143 - 147 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Implementation of Tamias to Check Production Rules for Parsing Expression Grammar Reviewed
Tetsuro Katayama, Toshihiro Miyaji, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networking and Artificial Life (JRNAL) 5 ( 4 ) 123 - 127 2019.9
Language：English Publishing type：Research paper (scientific journal)
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Implementation of Arduino Simulator ADVIS Visualizing the Value of Voltage on the Circuit Reviewed
Tetsuro Katayama, Tatsumi Nishida, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 5 ( 4 ) 249 - 252 2019.3
Language：English Publishing type：Research paper (scientific journal)
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RETUSS: Ensuring Traceability System between Class Diagram in UML and Java Source Code in Real Time Reviewed
Tetsuro Katayama, Keisuke Mori, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada and Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 5 ( 2 ) 114 - 117 2018.9
Language：English Publishing type：Research paper (scientific journal)
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Javaプログラムのデータ遷移可視化ツールTFVISの開発 Reviewed
佐藤 拓弥, 片山 徹郎, 喜多 義弘, 山場 久昭, 油田 健太郎, 岡崎 直宣
情報処理学会論文誌 59 ( 4 ) 1137 - 1149 2018.4
Language：Japanese Publishing type：Research paper (scientific journal)
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BWDM: Test Cases Automatic Generation Tool Based on Boundary Value Analysis with VDM++ Reviewed
Tetsuro Katayama, Hiroki Tachiyama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 4 ( 2 ) 110 - 113 2017.9
Language：English Publishing type：Research paper (scientific journal)
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Development of a Tool to Keep Consistency between a Model and a Source Code in Software Development Using MDA Reviewed
Tetsuro Katayama, Yuuki Kikkawa, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada and Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 3 ( 4 ) 231 - 235 2017.3
Language：English Publishing type：Research paper (scientific journal)
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TFVIS: a Supporting Debugging Tool for Java Programs by Visualizing Data Transitions and Execution Flows Reviewed
Tetsuro Katayama, Hiroto Nakamura, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 3 ) 177 - 181 2015.12
Language：English Publishing type：Research paper (scientific journal)
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Prototype of a Decision Table Generation Tool from the Formal Specification Reviewed
Tetsuro Katayama, Kenta Nishikawa, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 3 ) 205 - 208 2015.12
Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Modification Method of a Source Code to Correspond with a Modified Model in MDA Reviewed
Tetsuro Katayama, Yuuki Kikkawa, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 2 ) 136 - 140 2015.9
Language：English Publishing type：Research paper (scientific journal)
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Prototype of a Supporting Tool to Generate Testing Communication Diagram Reviewed
Tetsuro Katayama, Seiya Urata, Yohei Ogata, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 2 ( 1 ) 9 - 12 2015.6
Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Testing Method Using Similarity of Interleaving for Java Multi-threaded Programs Reviewed
T. Katayama, K. Nishikawa, Y. Kita, H. Yamaba and N. Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 1 ( 4 ) 299 - 302 2015.2
Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Supporting Method for Debugging to Reproduce Java Multi-threaded Programs by Petri-net Reviewed
T. Katayama, S. Kitano, Y. Kita, H. Yamaba and N. Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 1 ( 3 ) 212 - 215 2014.12
Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Supporting Method to Generate a Decision Table from the Formal Specification Reviewed
T. Katayama, K. Nishikawa, Y. Kita, H. Yamaba and N. Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 1 ( 3 ) 174 - 178 2014.12
Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Visualizing Method of Data Transitions to Support Debugging for Java Programs Reviewed
Tetsuro Katayama, Hiroto Nakamura, Yoshihiro Kita, Hisaaki Yamaba and Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 1 ( 2 ) 111 - 115 2014.9
Language：English Publishing type：Research paper (scientific journal)
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Proposal of a Method to Build Markov Chain Usage Model from UML Diagrams for Communication Delay Testing in Distributed Systems Reviewed
Tetsuro Katayama, Zhijia Zhao, Yoshihiro Kita, Hisaaki Yamaba and Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life, Atlantis Press 1 ( 2 ) 120 - 124 2014.9
Language：English Publishing type：Research paper (scientific journal)
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並列性を考慮した通信システムの相互接続試験系列生成法 Reviewed
共著者：朴美娘，岡崎直宣，三上節子，高橋薫，白鳥則郎，野口正一
情報処理学会論文誌，34巻，6号，1336-1346頁 1993.6
Language：Japanese Publishing type：Research paper (scientific journal)
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プロセスの独立性を考慮した通信システムの相互接続試験系列生成法 Reviewed
共著者：朴美娘，岡崎直宣，太田正孝，高橋薫，白鳥則郎，野口正一
電子情報通信学会論文誌，J76-B-Ⅰ巻，3号，264-273頁 1993.3
Language：Japanese Publishing type：Research paper (scientific journal)
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LOTOS仕様からの効率的な試験系列の生成法 Reviewed
共著者：岡崎直宣，高橋薫，白鳥則郎，野口正一
電子情報通信学会論文誌，J74-B-Ⅰ巻，10号，733-747頁 1991.10
Language：Japanese Publishing type：Research paper (scientific journal)
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ユーザフレンドリープロトコル検証システム Reviewed
共著者：山本博章，相沢茂喜，岡崎直宣，高橋薫，白鳥則郎，野口正一
電子情報通信学会論文誌，J70-D巻，11号，2219-2227頁 1987.11
Language：Japanese Publishing type：Research paper (scientific journal)
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Evacuation Support System for Tsunami Disasters that Considers Shelter Congestion
Nishi H., Nabeyama K., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1322 LNEE 51 - 62 2025.2
Authorship：Last author Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Electrical Engineering
When a tsunami occurs, an evacuation support system capable of providing information on evacuation routes and shelter locations would enable evacuations to be conducted more swiftly and safely. In previous research, a proposal was made for an evacuation support system using low-power, long-distance communication. However, a challenge arose when shelter locations reached full capacity, requiring information to be shared, which in turn necessitated redirection of evacuees to alternative shelters. Therefore, in this study, a method for sharing shelter congestion information at an earlier stage was developed. The method of sharing based on the remaining capacity of shelters increased evacuation completion by up to 29 evacuees in an evacuee population of 1000.
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An Attempt to Solve Fill in the Missing Letters CAPTCHA Using Generative AI Reviewed
Yamaba H., Usuzaki S., Aburada K., Mukunoki M., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1322 LNEE 385 - 395 2025.2
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Lecture Notes in Electrical Engineering
This paper reports an attempt to solve the fill in the missing letters type CAPTCHA using generative AI. Many websites have adopted CAPTCHA to prevent bots and other automated programs from engaging in malicious activities such as posting comment spam. Text-based CAPTCHA is the most common and earliest form of CAPTCHA. However, as optical character recognition (OCR) technology has improved, the intensity of distortions applied to a CAPTCHA to keep it unrecognizable by OCR has also increased. This has reached a point where humans are having difficulty recognizing CAPTCHA text. The CAPTCHA proposed in the previous study asks users to spell a word by filling in some blanks. Since the number of letters displayed is minimal, it is challenging to identify the correct word. However, one or more images that can serve as hints to help users guess the answer word are also provided. It is expected that the ability to guess can distinguish between humans and computers. However, it is conceivable that generative AI, which has been advancing in recent years, can substitute for this ability. A series of experiments was carried out to evaluated the performance of the generative AI’s ability to solve the proposed CAPTCHA. First, we examined whether a well-known image recognition system could accurately identify the images used in the CAPTCHA problems. Next, we used the recognition results to have the generative AI solve the CAPTCHA problems and determined the accuracy rate. Additionally, we evaluated the performance of the generative AI itself by solving the problems using the correct identification of each image. From the experimental results, it was found that the CAPTCHA is relatively robust against attack techniques using generative AI.
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A study of Collaborative malware detection using item response theory Reviewed
Takuro Inada, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The 30th International Symposium on Artificial Life and Robotics (AROB2025) 1070 - 1073 2025.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Introducing Generative AI into Unrealistic Image CAPTCHA for Effective Image Generation Reviewed
Kana Saiki, Hisaaki Yamaba, Shotaro Usuzaki, Kentaro Aburada, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
Proc. The 30th International Symposium on Artificial Life and Robotics (AROB2025) 1085 - 1090 2025.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Introduction of Feature Points in Images for Improvement of Finding Letters Type CAPTCHA Based on Neural Style Transfer Reviewed
Ramu Kiura, Hisaaki Yamaba, Shotaro Usuzaki, Kentaro Aburada, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
Proc. The 30th International Symposium on Artificial Life and Robotics (AROB2025) 1079 - 1084 2025.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Investigation of Detection Methods for Trojaned DNNs under Specific Conditions Reviewed
Shunya Izaki, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The 30th International Symposium on Artificial Life and Robotics (AROB2025) 1074 - 1078 2025.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Park M., Chang Z., Usuzaki S., Aburada K., Okazaki N.
Proceedings - 2024 12th International Symposium on Computing and Networking Workshops, CANDARW 2024 293 - 299 2024.11
Authorship：Last author Publishing type：Research paper (international conference proceedings) Publisher：Proceedings - 2024 12th International Symposium on Computing and Networking Workshops, CANDARW 2024
In recent years, with the number of users utilizing online services increasing, there is growing demand for more secure authentication methods. Existing authentication methods such as passwords, PINs, and pattern locks, while highly operational and convenient, have issues such as vulnerability to brute force attacks and voyeuristic attacks. As a solution to these problems, gaze authentication has been proposed, where a user draws pre-defined characters or symbols with their gaze, and the features obtained from the trajectory information are used for personal identification. Gaze-based authentication is resistant to attacks such as voyeuristic attacks, thermal attacks, and smudge attacks because it is difficult for a third party to observe the authentication process. However, it also has drawbacks, such as a low authentication success rate and a long authentication time. Therefore, this study proposes a personal authentication system that combines gaze-based image selection and gaze trajectory features to address the issues of authentication rate and authentication time in gaze-based authentication. Additionally, to verify the effectiveness of the proposed system, we collected eye movement trajectory data from users using a gaze detection device, performed data preprocessing and feature extraction, and then calculated the personal authentication rate using several machine learning algorithms. We confirmed that XGBoost had the highest authentication accuracy with an F-measure of 67.5%. Furthermore, in the evaluation of anomaly detection algorithms, Isolation Forest demonstrated superior performance compared to other algorithms.
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Proposal of Fill in the Missing Letters CAPTCHA Using Associations from Images Reviewed
Yamaba H., Mustaza M.N.F.B., Usuzaki S., Aburada K., Mukunoki M., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1114 LNEE 206 - 217 2024.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Lecture Notes in Electrical Engineering
This paper proposes a new fill in the missing letters type CAPTCHA using associations from images. Many web sites have adopted CAPTCHA to prevent bots and other automated programs from malicious activities such as posting comment spam. Text-based CAPTCHA is the most common and earliest CAPTCHA. But as optical character recognition (OCR) technology has improved, the intensity of distortions that must be applied to a CAPTCHA for it to remain unrecognizable by OCR has increased. This has reached a point where humans are having difficulty recognizing CAPTCHA text. The idea of the proposed CAPTCHA asks users to spell a word by filling some blanks. Since the number of shown letters are few, it is difficult to answer the correct word. But one or more images that can be used as hints to guess what is the answer word are also shown to the users. A series of experiments was carried out to evaluated the performance of the proposed CAPTCHA. First, a computer program was developed with various software languages for the usability evaluation. The system was used for the experiments to find the suitable parameters of the CAPTCHA such as numbers of letters that will be disclosed, position of disclosed letters. Next, security evaluation experiments were carried out using the system under the obtained parameters. The results of the experiments showed that the performance and limitation of the proposed CAPTCHA.
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Proposal of a DDoS Attack Detection Method Using the Communication Interval Reviewed
Iwasa K., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1114 LNEE 165 - 174 2024.1
Authorship：Last author Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Electrical Engineering
As the scale of Distributed Denial of Service (DDoS) attacks has been escalating in recent years, the need for real-time detection of attacks has increased. Existing intrusion detection systems (IDSs) perform detection with a fixed window size (assumed to be in hours). In previous research, attack detection was performed by preparing windows of multiple sizes, selecting the appropriate window based on the state of the data, and using features learned in advance for that window size. Although this method yielded a high DDoS attack detection rate of 98.30%, it exhibited a considerable false-positive rate of 7.37%. The proposed method measures the communication intervals of identical packets within the window, identified as attack-related in the previous survey, and classifies those packets with an average communication interval below a set threshold as attacks. The experiment resulted in a 50.2% decrease in the false-positive rate.
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Study of an Image-Based CAPTCHA that is Resistant to Attacks Using Image Recognition Systems Reviewed
Nishikawa S., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Okazaki N.
Lecture Notes in Electrical Engineering 1114 LNEE 175 - 184 2023.10
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Lecture Notes in Electrical Engineering
In today’s digital age, image-based CAPTCHAs are increasingly vulnerable to attacks using annotation services, which tag images and classify images according to their contents, or reverse image search services. To prevent such attacks, an image-based CAPTCHA was proposed that takes advantage of the fact that humans can correctly recognize images containing many discontinuous points, while existing image recognition systems misrecognize them. However, this CAPTCHA proved susceptible to attacks using noise reduction filters. The objective of the present study is to create a CAPTCHA using images that are resistant to such filters. Images used in the new CAPTCHA were realized by increasing the proportion of lines forming discontinuous surfaces in images. Experimental results demonstrated a human recognition rate of 95.8%, with the image recognition systems successfully identifying only one image overall. Moreover, when a noise reduction filter was applied, the recognition rate was lower than those reported in previous studies.
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Detection of Eye Misalignment Using an HMD with an Eye-tracking Capability Reviewed
Nagatomo Y., Uchida N., Ikeda T., Takatsuka K., Mukunoki M., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 863 - 867 2023.2
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
In this study, we implemented the Cover Test, a test method for diagnosing eye misalignment using a head-mounted display with an eye-tracking capability. Specifically, we created a virtual examination environment in a VR space. The eye-tracking technique collected eye movements immediately after the covering or uncovering of the eyes. Thus, we calculated the amount of eye deviation and developed a system to determine the presence and magnitude of strabismus and heterophoria.We assessed the system in the verification experiment by examining the consistency between the judgment results provided by this system and the clinical evaluation approach with the Maddox rod. The result was that we could verify the horizontal eye movements more accurately.
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Investigation of evacuation simulation from Tsunami considering road width in Aosima. Reviewed
Keita Nabeyama, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Proc. The 28th International Symposium on Artificial Life and Robotics 2023.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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On an improvement of hand gesture recognition for realizing a user authentication system using s-EMG. Reviewed
Soichiro Ishibashi, Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Naonobu Okazaki
Proc. The 28th International Symposium on Artificial Life and Robotics 2023.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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A study of improving the safety of defense system based on whitelist. Reviewed
Tsubasa Waki, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Proc. The 28th International Symposium on Artificial Life and Robotics 2023.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Investigation of PIN authentication schemes resistant to video-based recording attacks. Reviewed
Ryo Masuzawa, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The 28th International Symposium on Artificial Life and Robotics 2023.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Development of an anti-peeping passcode keypad using color/shape cursors Reviewed
Ryo Masuzawa, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Proc. The 27th International Symposium on Artificial Life and Robotics OS-7 1038 - 1042 2022.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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An Attempt at Data Augmentation for Realizing User Authentication Using s-EMG Signals Reviewed
Soichiro Ishibashi, Yuya Yamamoto, Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Naonobu Okazaki
Proc. The 27th International Symposium on Artificial Life and Robotics OS-7 1043 - 1046 2022.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Proposal and Evaluation of a Gesture Authentication Method with Peep Resistance for Smartwatches Reviewed
Mirang Park, Kentaro Aburada, Naonobu Okazaki
The 9th International Symposium on Computing and Networking (CANDAR 2021) ( PDAA3-3 ) 359 - 364 2021.11
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of Jawi CAPTCHA Using Digraphia Feature of the Malay Language Reviewed
Hisaaki Yamaba, Ahmad Saiful Aqmal Bin Ahmad Sohaimi, Shotaro Usuzaki, Kentaro Aburada, Masayuki Mukunoki, Mirang Park, and Naonobu Okazaki
16th International Workshop on Security (IWSEC 2021), LNCS 12835, Springer ( PDAA3-3 ) 119 - 133 2021.11
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Performance Evaluation of Blockchain Based Agricultural Input Voucher System Reviewed
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
2021 IEEE 10th Global Conference on Consumer Electronics, GCCE 2021 637 - 638 2021.10
Authorship：Last author Language：Japanese Publishing type：Research paper (international conference proceedings) Publisher：2021 IEEE 10th Global Conference on Consumer Electronics, GCCE 2021
Large portion of rural small-scale farmers in Tanzania can't afford to buy quality agricultural inputs (fertilizers and seeds), therefore the government of Tanzania provides these farmers with paper-based subsidy vouchers which allow them to buy the agricultural inputs at only half price. However, challenges like misuse of the vouchers by some government officials (stealing and favoritism in vouchers' allocation) and lack of trust (difficulty of verifying vouchers' authenticity) have resulted into low crop productivity for the farmers and loss of government funds. In our previous work, we developed agricultural input voucher system which stores and allocates digital subsidy vouchers to farmers in the Hyperledger Fabric blockchain network and we evaluated its performance based on transaction throughput and latency metrics which are important to farmers, who access the system through Short Message Service (SMS) in their mobile phones. The blockchain network's features such as hashing and digital signature prevent misuse and ensure trust of the digital vouchers. In this paper, we evaluate performance of the developed blockchain network based on resources (CPU and memory) consumption metrics which are important in planning resources during system deployment. The evaluation findings reveal that, Raft consensus protocol consumes resources more efficiently than Kafka consensus protocol.
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Development and Evaluation of Swahili Text Based CAPTCHA Reviewed
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech 2021) 297 - 301 2021.3
Language：English Publishing type：Research paper (international conference proceedings)
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Method for detecting eye misalignment based on movement near the center of the pupil Reviewed
Noriyuki Uchida, Kayoko Takatuka, Hisaaki Yamaba, Masayuki Mukunoki, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB2021) 165 - 169 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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Development and evaluation of blockchain based agricultural input voucher system Reviewed
Isakwisa Gaddy Tende, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki
Proc. The 26th International Symposium on Artificial Life and Robotics OS-3 ( 1 ) 1 - 6 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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An attempt at an introduction of deep learning for a user authentication system using s-EMG Reviewed
Hisaaki Yamaba, Kenya Shiraishi, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The 26th International Symposium on Artificial Life and Robotics OS-3 ( 3 ) 1 - 5 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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Blockchain-based vote-type unknown malware detection method using a characteristic of anti-virus vendors' voting Reviewed
Hiroki Muranaka, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The 26th International Symposium on Artificial Life and Robotics OS-3 ( 2 ) 1 - 5 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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Evaluation of Yubimoji Based Gestures for Realizing User Authentication Method Using s-EMG Reviewed
Hisaaki Yamaba, Yuki Nagatomo, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proceedings of the Workshops of the 34th International Conference on Advanced Information Networking and Applications (WAINA-2020) 834 - 844 2020.4
Language：English Publishing type：Research paper (international conference proceedings)
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Identification of Manual Alphabets Based Gestures Using s-EMG for Realizing User Authentication Reviewed
Hisaaki Yamaba, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
Int'l Conf. on Emerging Internetworking, Data & Web Technologies (EIDWT 2020) 323 - 333 2020.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Gait-Based Authentication using Anomaly Detection with Acceleration of Two Devices in Smart Lock Reviewed
Kazuki Watanabe, Makoto Nagatomo, Kentaro Aburada, Naonobu Okazaki, Mirang Park
Lecture Notes in Networks and Systems, Springer 97 ( 352 ) 362 2019.11
Language：English Publishing type：Research paper (international conference proceedings)
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Gait-Based Authentication for Smart Locks Using Accelerometers in Two Devices Reviewed
Kazuki Watanabe, Makoto Nagatomo, Kentaro Aburada, Naonobu Okazaki, Mirang Park
Advances in Networked-based Information Systems, Springer 1036 281 - 291 2019.9
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal and Evaluation of Authentication Method Having Shoulder-Surfing Resistance for Smartwatches Using Shift Rule Reviewed
Makoto Nagatomo, Kazuki Watanabe, Kentaro Aburada, Naonobu Okazaki, Mirang Park
Advances in Networked-based Information Systems, Springer 1036 560 - 569 2019.9
Language：English Publishing type：Research paper (international conference proceedings)
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Evaluation of Manual Alphabets Based Gestures for a User Authentication Method Using s-EMG Reviewed
Hisaaki Yamaba, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Advances in Networked-based Information Systems, Springer 1036 570 - 580 2019.9
Language：English Publishing type：Research paper (international conference proceedings)
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Blockchain-Based Malware Detection Method Using Shared Signatures of Suspected Malware Files Reviewed
Ryusei Fuji, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Norio Shiratori, Naonobu Okazaki
Advances in Networked-based Information Systems, Springer 1036 305 - 316 2019.8
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of Ad-Hoc Secure Device Pairing Method Using Similarity Between Marker Movement and Acceleration Reviewed
Makoto Nagatomo, Kentaro Aburada, Hisaaki Yamaba, Naonobu Okazaki, Mirang Park
Web, Artificial Intelligence and Network Applications, The Workshops of the 33rd International Conference on Advanced Information Networking and Applications (WAINA-2019) 683 - 692 2019.3
Language：English Publishing type：Research paper (international conference proceedings)
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Introduction of Fingerspelling for Realizing a User Authentication Method Using s-EMG Reviewed
Hisaaki Yamaba, Shimpei Inotani, Shotaro Usuzaki, Kayoko Takatsuka, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Advances in Intelligent Systems and Computing 693 - 701 2019.3
Language：English Publishing type：Research paper (international conference proceedings)
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Investigation on Sharing Signatures of Suspected Malware Files Using Blockchain Technology Reviewed
Ryusei Fuji, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Norio Shiratori, and Naonobu Okazaki
Lecture Notes in Engineering and Computer Science 94 - 99 2019.3
Language：English Publishing type：Research paper (international conference proceedings)
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Interactive Video CAPTCHA for Better Resistance to Automated Attack Reviewed
Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Masayuki Mukunoki, Mirang Park, Naonobu Okazaki
2018 Eleventh International Conference on Mobile Computing and Ubiquitous Network ( PD.12 ) 1 - 2 2019.2
Language：English Publishing type：Research paper (international conference proceedings)
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A bot detection method focused on HTTP request transmission behavior of clients. Reviewed
Ryusei Fuji, Shotaro Usuzaki, Kentaro Aburada, Hisaaki Yamaba, Tetsuro Katayama, Naonobu Okazaki, Mirang Park
Proc. The 24th International Symposium on Artificial Life and Robotics 2019.1
Language：English Publishing type：Research paper (international conference proceedings)
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A proposal of new reading text CAPTCHA using random dot patterns Reviewed
Hisaaki Yamaba, Shotaro Usuzaki, Kentaro Aburada, Masayuki Mukunoki, Mirang Park and Naonobu Okazaki
Proceedings - 2018 6th International Symposium on Computing and Networking, CANDAR 2018 ( 5B-3 ) 1 - 6 2018.12
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal and Evaluation of Secure Device Pairing Method with Camera and Accelerometer Reviewed
Makoto Nagatomo, Kentaro Aburada, Naonobu Okazaki and Mirang Park
The Sixth International Symposium on Computing and Networking (CANDAR 2018) ( PDAA3-3 ) 1 - 6 2018.12
Language：English Publishing type：Research paper (international conference proceedings)
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An Examination of Pairing Method with Camera and Acceleration Sensor Reviewed
Makoto Nagatomo, Kentaro Aburada, Naonobu Okazaki, Mirang Park
2018 Eleventh International Conference on Mobile Computing and Ubiquitous Network ( S3.4 ) 1 - 4 2018.10
Language：English Publishing type：Research paper (international conference proceedings)
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Evaluation of User Identification Methods for Realizing an Authentication System Using s-EMG Reviewed
Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
Advances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies, Springer 22 733 - 742 2018.9
Language：English Publishing type：Research paper (scientific journal)
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A study on user identification method using cross-correlation and SVM to realize an authentication system by s-EMG Reviewed
Tokiyoshi Kurogi, Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
International Symposium on Artificial Life and Robotics 462 - 467 2018.1
Language：English Publishing type：Research paper (international conference proceedings)
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Automated cover-uncover test system using active LCD shutter glasses Reviewed
Noriyuki Uchida, Kayoko Takatuka, Kouki Hinokuma, Konomi Hirata, Hisaaki Yamaba, Naonobu Okazaki
International Symposium on Artificial Life and Robotics 698 - 702 2018.1
Language：English Publishing type：Research paper (international conference proceedings)
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Introduction of traffic characteristics to distinguish legitimate user traffic from DDoS attack traffic Reviewed
Yuki Arikawa, Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
International Symposium on Artificial Life and Robotics 484 - 489 2018.1
Language：English Publishing type：Research paper (international conference proceedings)
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Development of a Monitoring System Based on Power Consumption Reviewed
Kentaro Aburada, Kengo Todaka, Hisaaki Yamaba, Tetsuro Katayama, Mirang Park, Norio Shiratori and Naonobu Okazaki
Advances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies, Springer 7 363 - 372 2018
Language：English Publishing type：Research paper (international conference proceedings)
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Evaluation and Improvement of Farmers Market Information System to Connect with Some Social Stakeholders Reviewed
Isakwisa Gaddy Tende, Shin-Ichiro Kubota, Kentaro Aburada, Naonobu Okazaki
Advances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies, Springer 7 431 - 442 2017.8
Language：English Publishing type：Research paper (scientific journal)
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Highly Responsive Distributed Denial-of-Service Attacks Detection by Using Real-Time Burst Detection Method Reviewed
Shotaro Usuzaki, Yuki Arikawa, Hisaaki Yamaba, Kentaro Aburada, Shin-Ichiro Kubota, Mirang Park, Naonobu Okazaki
Advances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies, Springer 7 914 - 923 2017.8
Language：English Publishing type：Research paper (scientific journal)
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Empirical Evaluation of Rhythm-Based Authentication Method for Mobile Devices Reviewed
Takahiro Hori, Yoshihiro Kita, Kentaroh Toyoda, Naonobu Okazaki and Mirang Park
Advances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies, Springer 7 529 - 538 2017.8
Language：English Publishing type：Research paper (scientific journal)
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An attempt to use support vector machines for a user authentication system using surface electromyogram signals Reviewed
Hisaaki Yamaba, Tokiyoshi Kurogi, Shin-Ichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
23rd International Symposium on Artificiarl Life and Robotics OS3-5 2017.1
Language：English Publishing type：Research paper (scientific journal)
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SGM: A Subgroup Management Scheme Using K-Means Clustering in M2M Systems Reviewed
Jihoon Hong, Mirang Park, Naonobu Okazaki
Proceedings of the 2016 International Conference on Network-Based Information Systems (NBiS 2016) 146 - 151 2016.9
Language：English Publishing type：Research paper (international conference proceedings)
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Unsupervised SPITters Detection Scheme for Unbalanced Callers Reviewed
K. Toyoda, M. Park, N. Okazaki
The 30th IEEE International Conference on Advanced Information Networking and Applications Workshops (AINA-2016) 64 - 68 2016.3
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of an Authentication Method using Two Types of Machine Learning and Mouse Operation Trajectory Reviewed
Y. Kita, K. Aburada, T. Katayama, M. Park, and N. Okazaki
The First International Symposium on BioComplexity 2016 (ISBC 2016) 346 - 349 2016.1
Language：English Publishing type：Research paper (international conference proceedings)
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An attempt to use a gesture control armband for a user authentication system using surface electromyograms Reviewed
H.Yamaba,A.Kurogi,S.Kubota,T.Katayama,N.Okazaki
Proceedings of 21th International Symposium on Artificial Life and Robotics 342 - 345 2016.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of Rhythm Authentication Method using Users Classification by Self-Organizing Map Reviewed
Yoshihiro Kita, Mirang Park, Naonobu Okazaki
Proceedings of the 2015 International Conference on Network-Based Information Systems (NBiS 2015) ( S2-4 ) 1 - 4 2015.9
Language：English Publishing type：Research paper (international conference proceedings)
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Study of Filter Sharing Method using Virtual Peers in P2P Networks Reviewed
Masahiro Sakuma, Yoshihiro Kita, Kentaro Aburada, Mirang Park, Naonobu Okazaki
Proc. The 29th IEEE International Conference on Advanced Information Networking and Applications (AINA-2015) 720 - 726 2015.3
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Content access control scheme for P2P networks using a reputation value Reviewed
Kentaro Aburada, Yoshihiro Kita, Mirang Park, Naonobu Okazaki
Proc. The 29th IEEE International Conference on Advanced Information Networking and Applications (AINA-2015) 527 - 533 2015.3
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of Security Evaluation System using User's Reviews and Permissions for Android Applications Reviewed
Naonobu Okazaki, Yoshihiro Kita, Kentaro Aburada, and Mirang Park
Proc. The International Conference on Artificial Life and Robotics 2015 331 - 334 2015.1
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (international conference proceedings)
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Evaluation of Neighbors Based Routing for ad hoc networks Reviewed
Kentaro Aburada, Hisaaki Yamaba, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 335 - 339 2015.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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An Authentication Method for Mobile Devices that is Independent of Tap-Operation on a Touchscreen Reviewed
Hisaaki Yamaba,, Nagatomo, Kentaro Aburada, Shinichiro Kubota, Tetsuro Katayama, Mirang Park, Naonobu Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 327 - 330 2015.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings)
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N. Aridome, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2025 Int'l Conf. on Artificial Life and Robotics (ICAROB 2025) 575 - 579 2025.2
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
TDD is a development methodology that brings us closer to better implementation and testing by repeating a series of steps: test design, implementation that satisfies the tests, and refactoring. This paper proposes a framework aimed at supporting the implementation steps in TDD. The proposed framework generates source code that passes tests while retaining refactoring by the developer. The prototyped framework reduced the time required for the implementation process by 94.22% and the generation time by 66.17% compared to manual work.
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Y. Kimura, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2025 Int'l Conf. on Artificial Life and Robotics (ICAROB 2025) 580 - 584 2025.2
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
TDD is a development methodology that brings us closer to better implementation and testing by repeating a series of steps: test design, implementation that satisfies the tests, and refactoring. This paper proposes a framework aimed at supporting the implementation steps in TDD. The proposed framework generates source code that passes tests while retaining refactoring by the developer. The prototyped framework reduced the time required for the implementation process by 94.22% and the generation time by 66.17% compared to manual work.
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Onaga H., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 252 - 256 2024
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
It is difficult to understand the structure of large and complex mobile applications. To support iOS app development, we proposed SwiftDiagram, a visualization of the static structure of Swift source code and confirmed its high usefulness. However, manually drawing SwiftDiagram is labor-intensive. This paper implemented a prototype of RAGESS (Real-time Automatic Generation of SwiftDiagram System), a tool that automatically generates SwiftDiagram by performing static analysis on Swift source code every time an iOS app build is successful.
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Takakura S., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 257 - 261 2024
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
Generating test cases from the formal specification description VDM++, which is a method for disambiguating specifications, is time-consuming and labor intensive. Therefore, our laboratory has developed BWDM, a tool that automatically generates test cases from VDM++ specifications. However, existing BWDM has problems that it only supports integer types and cannot generate test cases for operation and function definitions including recursive structure. Therefore, in order to improve the usefulness of BWDM, this paper extends BWDM to solve the above problems. Consequently, it has confirmed that the use of extended BWDM can reduce the test case generation time compared to manual test case generation.
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Kakinoki K., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 262 - 266 2024
Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
This paper proposes a prototype of ASLA, segmentation and labeling tool for document images based on deep learning, to reduce the time required for region segmentation and label generation. To evaluate the usefulness of ASLA, we have compared the time required for region segmentation and label generation using ASLA and by hand, and then confirmed the reduction in time. We also have confirmed that the rule-based region redividing method achieves a high recall and precision.
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Miyashita T., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 345 - 349 2023.2
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
TDD is a development methodology that brings us closer to better implementation and testing by repeating a series of steps: test design, implementation that satisfies the tests, and refactoring. This paper proposes a framework aimed at supporting the implementation steps in TDD. The proposed framework generates source code that passes tests while retaining refactoring by the developer. The prototyped framework reduced the time required for the implementation process by 94.22% and the generation time by 66.17% compared to manual work.
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Saputra M.C., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 350 - 354 2023.2
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
The outbreak of the COVID-19 pandemic changed the model of the learning process. Online learning became one of the best solutions for many educational institutions, including the University, especially the Faculty of Computer Science, Brawijaya University. The continuance intention factor for using an online learning management system is important to ensure learning sustainability. To understand students' continuance intention this study proposes self determination model as a research model to find the factors affecting students' continuance intention toward online learning management systems. The proposed model is useful for investigating continuance intention factors. The study finds that intrinsic regulation, external regulation, identified regulation, and introjected regulation significantly positive impact on continuance intention in learning management systems. Finally, this study provides suggestions for the Faculty to improve the continuance intention of the student in using an online learning management system.
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Takafumi Muto, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proceedings of International Conference on Artificial Life and Robotics 183 - 187 2022.1
Authorship：Last author Language：Japanese Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
Generating test cases from the VDM++ specification to eliminate ambiguity in the specification is labor-intensive and time-consuming. Therefore, our laboratory developed BWDM, which is an automatic test case generation tool for VDM++ specifications. However, BWDM is not very useful because it has three problems about its narrow scope of application. This paper extends BWDM to solve three problems. In addition, we conducted a comparison experiment with manual test case generation and confirmed a time saving of about 17 minutes.
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Proposal of Gamma Which Is a Spatial Data Sharing Distributed MQTT System Reviewed
Takahiro Ueda, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proceedings of International Conference on Artificial Life and Robotics 188 - 192 2022.1
Authorship：Last author Language：English Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
This paper proposes Gamma, which is a new distributed MQTT system, to improve the usefulness of distributed MQTT systems for sharing spatial data. In the experiment, it has been found that Gamma can process more messages than a single MQTT broker. It is confirmed that Gamma achieves scalability by increasing the number of Gateways and distributed MQTT brokers. Furthermore, it is confirmed that the efficiency of the distributed MQTT system can be improved by setting the responsibility area of Gateways.
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Kensuke Suga, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proceedings of International Conference on Artificial Life and Robotics 178 - 182 2022.1
Authorship：Last author Language：Japanese Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
Writing VDM++ specifications is difficult. The existing method can automatically generate type and constant definitions in VDM++ specification from natural language specification using machine learning. This paper proposes a method to generate classes and instance variable definitions in the VDM++ specification from natural language specification to improve the usefulness of the existing method. From the evaluation experiment by using F-values, it has been confirmed that the proposed method can improve the usefulness of the existing method.
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Test Suite Reusability Measurement Based on Frequency and Coverage of Reused Test Cases Reviewed
Mochamad Chandra Saputra, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB2021) 344 - 347 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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Improvement of RETUSS to Ensure Traceability between Sequence Diagram in UML and Java Source Code in Real Time Reviewed
Kaoru Arima, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB2021) 352 - 355 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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The Seven Information Features of Class for Blob and Feature Envy Smell Detection in a Class Diagram Reviewed
Bayu Priyambadha, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2021 Int’l Conf. on Artificial Life and Robotics (ICAROB2021) 348 - 351 2021.1
Language：English Publishing type：Research paper (international conference proceedings)
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Test suite reusability measurement based on uses frequently and coverage of reused test cases Reviewed
Saputra M.C., Katayama T., Kita Y., Yamaba H., Aburada K., Okazaki N.
Proceedings of International Conference on Artificial Life and Robotics 2021 344 - 347 2021.1
Authorship：Last author Publishing type：Research paper (international conference proceedings) Publisher：Proceedings of International Conference on Artificial Life and Robotics
Reusability of a test suite is one of important factors to decrease the cost in software testing. This research defines and measures the test suite reusability score expressed with the degree of reusability of the test suite. It is calculated by considering both frequency and code coverage of successful reused test cases in the test suite. Test suite reusability measurement provides useful information to improve the efficiency of software testing, especially in regression testing and automated testing.
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Test Cases Redundant Elimination on Code Coverage Uses Distance and Correlation Measurement Method Reviewed
Mochamad Chandra Saputra, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2020 Int’l Conf. on Artificial Life and Robotics (ICAROB2020) 755 - 758 2020.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of an Algorithm to Generate VDM++ by Using Words Extracted from the Natural Language Specification Reviewed
Yasuhiro Shigyo, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2020 Int’l Conf. on Artificial Life and Robotics (ICAROB2020) 763 - 766 2020.1
Language：English Publishing type：Research paper (international conference proceedings)
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The Measurement of Class Cohesion using Semantic Approach Reviewed
Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2020 Int’l Conf. on Artificial Life and Robotics (ICAROB2020) 759 - 762 2020.1
Language：English Publishing type：Research paper (international conference proceedings)
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Implementation of an Arduino Simulator to Support Circuit Design Reviewed
Tatsumi Nishida, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
ICAROB 2019: PROCEEDINGS OF THE 2019 INTERNATIONAL CONFERENCE ON ARTIFICIAL LIFE AND ROBOTICS 173 - 176 2019.2
Language：English Publishing type：Research paper (international conference proceedings)
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Application of Pairwise Testing to Test Cases by Boundary Value Analysis in BWDM Reviewed
Futa Hirakoba, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
ICAROB 2019: PROCEEDINGS OF THE 2019 INTERNATIONAL CONFERENCE ON ARTIFICIAL LIFE AND ROBOTICS 161 - 164 2019.2
Language：English Publishing type：Research paper (international conference proceedings)
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Development of Library Fescue Extracting Elements of Attributes and Operations of Class Diagram in UML Reviewed
Keisuke Mori, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
ICAROB 2019: PROCEEDINGS OF THE 2019 INTERNATIONAL CONFERENCE ON ARTIFICIAL LIFE AND ROBOTICS 165 - 168 2019.2
Language：English Publishing type：Research paper (international conference proceedings)
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Tamias: a Syntax File Checker for Parsing Expression Grammar Reviewed
Toshihiro Miyaji, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
ICAROB 2019: PROCEEDINGS OF THE 2019 INTERNATIONAL CONFERENCE ON ARTIFICIAL LIFE AND ROBOTICS 169 - 172 2019.2
Language：English Publishing type：Research paper (international conference proceedings)
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Implementation of RETUSS to Ensure Traceability between Class Diagram in UML and Java Source Code in Real Time Reviewed
Keisuke Mori, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, and Naonobu Okazaki
Proc. 2018 Int’l Conf. on Artificial Life and Robotics (ICAROB2018) 522 - 525 2018.2
Language：English Publishing type：Research paper (international conference proceedings)
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Prototype of a Tool to Defect Specific Comments Reviewed
Satoshi Tanoue, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, and Naonobu Okazaki
Proceedings of International Conference on Artificial Life and Robotics (ICAROB2018) 526 - 529 2018.2
Language：English Publishing type：Research paper (international conference proceedings)
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Development of a Tool to Keep Consistency between a Model and a Source Code in Software Development Using MDA Reviewed
Yuuki Kikkawa, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, and Naonobu Okazaki
Proc. 2016 Int'l Conf. on Artificial Life and Robotics (ICAROB 2016) 340 - 344 2016.1
Language：English Publishing type：Research paper (international conference proceedings)
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Prototype of a Decision Table Generation Tool from the Formal Specification Reviewed
K. Nishikawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 388 - 391 2015.1
Language：English Publishing type：Research paper (international conference proceedings)
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TFVIS: a Supporting Debugging Tool for Java Programs by Visualizing Data Transitions and Execution Flows Reviewed
H. Nakamura, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 376 - 379 2015.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Testing Method Using Similarity of Interleaving for Java Multi-threaded Programs Reviewed
S. Kitano, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 380 - 383 2015.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Modification Method of a Source Code to Correspond with a Modified Model in MDA Reviewed
Y. Kikkawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 384 - 387 2015.1
Language：English Publishing type：Research paper (international conference proceedings)
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Prototype of a Supporting Tool to Generate Testing Communication Diagram Reviewed
T. Katayama, S. Urata, Y. Ogata, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. The International Conference on Artificial Life and Robotics 2015 368 - 371 2015.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Puzzle Authentication Method with Shoulder-surfing Attack Resistance Reviewed
Mirang Park, Yoshihiro Kita, Kentaro Aburada, Naonobu Okazaki
Proceedings of the 2014 International Conference on Network-Based Information Systems (NBiS 2014) 495 - 500 2014.9
Language：English Publishing type：Research paper (international conference proceedings)
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Representation of human preference using folksonomy and the Idea called concept Reviewed
Michihito Tanoue, Hisaaki YAMABA, Kayoko TAKATSUKA, Naonobu OKAZAKI, Shigeyuki TOMITA
Proceedings of 19th International Symposium on Artificial Life and Robotics 162 - 167 2014.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Visualizing Method of Data Transitions to Support Debugging for Java Reviewed
Hiroto Nakamura, Tetsuro Katayama, Hisaaki Yamaba, Naonobu Okazaki, Yoshihiro Kita
Proc. International Conference on Artificial Life and Robotics (ICAROB 2014) 210 - 213 2014.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Supporting Method to Generate a Decision Table from the Formal Specification Reviewed
Kenta Nishikawa, Tetsuro Katayama, Hisaaki Yamaba, Naonobu Okazaki, Yoshihiro Kita
Proc. International Conference on Artificial Life and Robotics (ICAROB 2014) 222 - 225 2014.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Supporting Method for Debugging to Reproduce Java Multi-threaded Programs by Petri-Net Reviewed
Shoichiro Kitano, Tetsuro Katayama, Hisaaki Yamaba, Naonobu Okazaki, Yoshihiro Kita
Proc. International Conference on Artificial Life and Robotics (ICAROB 2014) 218 - 221 2014.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Method to Build Markov Chain Usage Model from UML Diagrams for Communication Delay Testing in Distributed Systems Reviewed
Zhijia Zhao, Tetsuro Katayama, Hisaaki Yamaba, Naonobu Okazaki, Yoshihiro Kita
Proc. International Conference on Artificial Life and Robotics (ICAROB 2014) 214 - 217 2014.1
Language：English Publishing type：Research paper (international conference proceedings)
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Investigation of the Routing Method Based on the Number of Neighbor Nodes Reviewed
Kentaro Aburada, Mirang Park and Naonobu Okazaki
The 7th International Conference on Mobile Computing and Ubiquitous Networking 2014.1
Language：English Publishing type：Research paper (international conference proceedings)
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On a serendipity-oriented recommender system based on folksonomy and its evaluation Reviewed
Hisaaki YAMABA, Michihito TANOUE, Kayoko TAKATSUKA, Naonobu OKAZAKI, Shigeyuki TOMITA
Proc. 17th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems (KES2013) 383 - 391 2013.9
Language：English Publishing type：Research paper (international conference proceedings)
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A conversion method from an ETSC to a timed Petri net to improve the matrix-based discrete event controller and its unified support system Reviewed
Hisaaki YAMABA, Shoichiro KITANO, Kayoko TAKATSUKA, Tetsuro KATAYAMA, Naonobu OKAZAKI, Shigeyuki TOMITA
Proc. 17th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems (KES2013) 660 - 669 2013.9
Language：English Publishing type：Research paper (international conference proceedings)
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STDS認証方式における録画解析による攻撃への耐性に関する一検討 Reviewed
喜多義弘，菅井文郎，朴美娘，岡崎直宣，西村広光，鳥井秀幸，岡本剛
第12回情報科学技術フォーラム（FIT2013）（査読付） ( 4 ) 7 - 14 2013.9
Language：Japanese Publishing type：Research paper (scientific journal)
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Proposal and implementation of a shoulder-surfing attack resistant authentication method using two shift functions Reviewed
Yoshihiro Kita, Fumio Sugai, Mirang Park, Naonobu Okazaki
The Second International Conference on Cyber Security, Cyber Peacefare and Digital Forensic (CyberSec2013) 54 - 59 2013.3
Language：English Publishing type：Research paper (international conference proceedings)
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On a serendipity oriented recommender system based on folksonomy Reviewed
H.Yamaba, M.Tanoue, K.Takatsuka, N.Okazaki, S.Tomita
18th Internatinal Symposium on Artificial Life and Robotics 338 - 341 2013.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a content access control scheme on a reputation value over P2P networks Reviewed
Kentaro Aburada, Mirang Park, Masami Ikeda, Hisaaki Yamaba, Naonobu Okazaki
The Sixth International Conference on Mobile Computing and Ubiquitous Networking (ICMU 2012) 124 - 125 2012.5
Language：English Publishing type：Research paper (international conference proceedings)
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Improving Throughput of WLANs by Scheduling Random Access Reviewed
Xuejun Tian, Tetsuo Ideguchi, Takashi Okuda, Naonobu Okazaki
International Symposium on Wireless and Pervasive Computing (ISWPC 2011) 5 ( 3 ) 1 - 6 2011.2
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a zone disjoint multi-path routing for ad hoc networks Reviewed
Kentaro Aburada, Masaru Eto, Naonobu Okazaki and Mirang Park
Proc. 8th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2010) C-8 ( 2 ) 1 - 4 2010.6
Language：English Publishing type：Research paper (international conference proceedings)
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An Efficient Light-path Setup Scheme for Dynamic Traffic in Ring-based Wavelength-routed networks Reviewed
Yusuke Sato, Mirang Park, Naonobu Okazaki
The 7th International Conference on the Optical Internet (COIN2008) C16 ( PM2-1-3 ) 1 - 2 2008.10
Language：English Publishing type：Research paper (international conference proceedings)
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サイトの移動判定によるフィッシングサイト検知手法の検討 Reviewed
五島優美, 岡崎直宣
第７回情報科学技術フォーラム（FIT2008）講演論文集 4 5 - 8 2008.9
Language：Japanese Publishing type：Research paper (scientific journal)
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センサネットワークにおけるHop-Vector に基づくノード位置推定手法の検討 Reviewed
河内 康佑, 佐藤 雄亮, 油田 健太郎, 岡崎 直宣, 冨田 重幸
第７回情報科学技術フォーラム（FIT2008）講演論文集 4 47 - 50 2008.9
Language：Japanese Publishing type：Research paper (scientific journal)
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A hop-vector based routing scheme for Data-Centric Sensor Networks Reviewed
K. Aburada, Y. Sato, N. Okazaki, S.Tomita and Mi Rang Park
Proc. the Fourth International Conference on Mobile Computing and Ubiquitous Networking (ICMU 2008) 170 - 175 2008.6
Language：English Publishing type：Research paper (international conference proceedings)
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An Effective Light-path Setup Scheme for Dynamic Traffic in Multi-ring Wavelength-routed networks Reviewed
Mirang Park, Yoshimasa Baba, Shoichiro Seno, Naonobu Okazaki
Proc. the 12th Optoelectronics and Communications Conference and the 16th International Conference on Integrated Optics and Optical Fiber Communication (OECC/IOOC2007) ( 12A2-4 ) 1 - 2 2007.7
Language：English Publishing type：Research paper (international conference proceedings)
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A Seamless Wireless User Authentication Protocol in WLAN Based on FMIPv6 Reviewed
Rika Tamazato, Mirang Park, Naonobu Okazaki
Proc. the First Joint Workshop on Information Security (JWIS2006) 199 - 216 2006.9
Language：English Publishing type：Research paper (international conference proceedings)
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A proposal and its evaluation of an extended fragment marking scheme for IP traceback Reviewed
Tetsuya Yahata, Katsuhiro Koga, Naonobu Okazaki, Mirang Park
Proc. the First Joint Workshop on Information Security (JWIS2006) 279 - 292 2006.9
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Robust Zone-based Hierarchical Routing Method for Ad Hoc Networks Reviewed
Kentaro Aburada, Kanako Morita, Naonobu Okazaki, Shigeyuki Tomita and Mi Rang Park
Proc. the 12th Asia-Pacific Conference on Communications (APCC2006) ( 1D-2 ) 1 - 5 2006.8
Language：English Publishing type：Research paper (international conference proceedings)
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A New User Authentication Protocol for Mobile Terminals in Wireless Network Reviewed
Mirang PARK, Naonobu OKAZAKI, Yoshimasa BABA
Proc. the 2006 International Workshop on Future Mobile and Ubiquitous Information Technologies (FMUIT'06) 44 - 48 2006.5
Language：English Publishing type：Research paper (international conference proceedings)
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A Proposal and its Evaluations of a Re-keying Method for Dynamic Secure Group Communications Reviewed
共著者：M. Park, N. Okazaki, K. Kashima, K. Oshima
Proc. The 18th International Conference on Advanced Information Networking and Applications, Vol.2, pp.43-48 2004.1
Language：English Publishing type：Research paper (international conference proceedings)
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Virus Extermination by Vaccine with Pursuit Function Reviewed
共著者：N. Nakaya, Y. Koui, H. Yoshida, S. Seno, N. Okazaki
Proc. 9th Asia Pacific Conference on Communications, pp.909-913 2003.10
Language：English Publishing type：Research paper (international conference proceedings)
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Private Network Management System Using Network Address Translations Reviewed
共著者：N. Okazaki, Y. Baba, M. R. Park, T. Shiina, T. Ideguchi
Proc. the 2001 Asia Pacific Symposium on Information and Telecommunication Technologies, pp.254-258 2001.11
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Data Transfer Protocol Suitable for Multimedia Communication on Shared-Media LAN Reviewed
共著者：M. Yabe, T. Ideguchi, T. Fujii, Y. Koui, Y. Baba, N. Okazaki
Proc. the 1999 Asia Pacific Conference on Communications, pp.246-249 1999.11
Language：English Publishing type：Research paper (international conference proceedings)
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An Efficient Method for Private Network Management Using Address Translations Reviewed
共著者：N. Okazaki, Y. Baba, M. R. Park, K. Nakata, T. Ideguchi
Proc. the 1999 Asia Pacific Symposium on Information and Telecommunication Technologies, pp.256-260 1999.8
Language：English Publishing type：Research paper (international conference proceedings)
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High-performance Communication Processing by the Data-driven Multi-processor System Reviewed
共著者：S. Seno, T. Ideguchi, Y. Koui, N. Okazaki
Proc. the 1999 Asia Pacific Symposium on Information and Telecommunication Technologies, pp.322-325 1999.8
Language：English Publishing type：Research paper (international conference proceedings)
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Evaluation of Remote Authentication System using Fingerprint Reviewed
共著者：Y. Baba, H. Nakamura, T. Fujii, T. Sadakane, N. Okazaki
Proc. the 1999 Asia Pacific Symposium on Information and Telecommunication Technologies, pp.318-321 1999.8
Language：English Publishing type：Research paper (international conference proceedings)
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A Dynamic Flexible Grouping over CORBA-based Network within and across Organizations Reviewed
共著者：T. Okuda, S. Adachi, T. Ideguchi, H. Yasukawa, X. Tian, N. Okazaki
Proc. the Asia-Pacific Symposium on Information and Telecommunication Technologies, pp.141-145 1999.7
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Synchronous Data Transfer Protocol Suitable for FDDI with RSVP Mechanism Reviewed
共著者：M. Yabe, T. Fujii, Y. Koui, T. Ideguchi, Y. Baba, N. Okazaki
Proc. the 1998 IEEE Asia Pacific Conference on Communications, pp.191-195 1998.10
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal of a Key Sharing Method for Secure Communication Systems Reviewed
Mirang PARK, Akira WATANABE, Naonobu OKAZAKI and Tetsuo IDEGUCHI
Proc. the Taiwan-Japan Joint Workshop on The Latest Development of Telecommunication Research (TJCOM98) 113 - 118 1998.1
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal and Evaluation for Application Methods of RSVP over FDDI Reviewed
Yuuji KOUI, Naonobu OKAZAKI, Tetsuo IDEGUCHI, Shoichiro SENO, Masayuki YABE and Akira WATANABE
Proc. the 1997 International Symposium on Communications (ISCOM’97) 404 - 408 1997.12
Language：English Publishing type：Research paper (international conference proceedings)
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Application of RSVP over FDDI using Synchronous Data Transmission Class Method Reviewed
共著者：M. Yabe, N. Okazaki, Y. Koui, T. Ideguchi, S. Seno, N. Tsubone
Proc. the Third Asia-Pacific Conference on Communications, pp.187-191 1997.12
Language：English Publishing type：Research paper (international conference proceedings)
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Performance Estimate of Compression Characteristics on Wide Area Network Reviewed
共著者：Y. Saito, N. Okazaki, S. Seno, T. Ideguchi, Y. Koui, M. Yabe
Proc. the Third Asia-Pacific Conference on Communications, pp.1323-1327 1997.12
Language：English Publishing type：Research paper (international conference proceedings)
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Proposal and Evaluation of a New Time Critical Communication Protocol on LAN Reviewed
共著者：N. Okazaki, T. Fujii, S. Seno, Y. Koui, T. Ideguchi, M. Yabe
Proc. the Asia-Pacific Symposium on Information and Telecommunication Technologies, pp.141-145 1997.3
Language：English Publishing type：Research paper (international conference proceedings)
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A New Test Sequence Generation Method for Interoperability Testing Reviewed
共著者：N. Okazaki, M. R. Park, K. Takahashi, N. Shiratori
Protocol Test Systems 7th workshop, Chapman & Hall, pp.243 - 258 1994.6
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Test Sequence Generation for Multiprocess Communication Systems Reviewed
共著者：N. Okazaki, M. R. Park, M. Ohta, K. Takahashi
Proc. the 1993 Asia Pacific Conference on Communications, pp.210-214 1993.8
Language：English Publishing type：Research paper (international conference proceedings)
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Test Sequence Generation for Interoperability Testing Considering Parallel Processes Reviewed
Naonobu OKAZAKI, Mi Rang PARK, Setsuko MIKAMI, Kaoru TAKAHASHI and Masataka OHTA
Proc. the 6th Joint Conference on Communication, Networks and Switching Systems 107 - 112 1993.6
Language：English Publishing type：Research paper (international conference proceedings)
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MASUDA SHINYA, SUZUKI HIDEKAZU, OKAZAKI NAONOBU, WATANABE AKIRA
IPSJ Journal 47 ( 7 ) 2258 - 2266 2006.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
Threats to network security have become a serious problem, and encryption technologies for communications are an important issue these days. Although the security of IPsec ESP (a typical existing cipher communication technology) is strong, it has such problems that it can not be used in the environment where it coexists with NAT and firewalls, and that there also causes some degradation of throughput. For such reasons, ESP is used only for some limited applications such as VPN (Virtual Private Network). In this paper, we propose a new cipher communication protocol, called PCCOM (Practical Cipher COMmunication), that can verify the identity of the corresponding counterpart and assure the integrity of packets in the environment where it coexists with NAT and firewalls, without changing the format of the original packets. To confirm the effectiveness of PCCOM, we installed a trial system in FreeBSD, and confirmed the coexistibility with NAT and firewalls. We also measured its throughput, and good performance was confirmed owing to "no change" of the packet format.
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色の恒常性を利用したCAPTCHAの機械攻撃耐性の評価と分析
永井 麻裕, 臼崎 翔太郎, 油田 健太郎, 山場 久昭, 椋木 雅之, 岡崎 直宣
情報処理学会火の国情報シンポジウム2022論文集 ( B12-4 ) 1 - 8 2022.3
Authorship：Last author Language：Japanese Publishing type：Research paper (other academic)
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ウィンドウサイズ調整型監視によるリアルタイム性DDoS攻撃検知手法の検討
溝口 李佳, 臼﨑 翔太郎, 油田 健太郎, 山場 久昭, 岡崎 直宣
情報処理学会火の国情報シンポジウム2022論文集 ( B12-5 ) 1 - 8 2022.3
Authorship：Last author Language：Japanese Publishing type：Research paper (other academic)
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継続的な認証及び異なる歩行速度での二つの端末を用いた異常検知による歩行認証の研究
渡辺 一樹、油田 健太郎、岡崎 直宣、朴 美娘
IPSJ SIG Technical Reports 2021-SPT-41 ( 16 ) 2021.3
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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ウェアラブル端末を用いた覗き見耐性を持つジェスチャー認証手法の提案と評価
嘉藤 鴻介、渡辺 一樹、油田 健太郎、岡崎 直宣、朴 美娘
IPSJ SIG Technical Reports 2021-SPT-41 ( 17 ) 2021.3
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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分散機械学習における勾配の 異常検知を用いたブロックチェーンシステムの提案とその実現性の評価
長友 誠、油田 健太郎、岡崎 直宣、朴 美娘
IPSJ SIG Technical Reports 2020-CSEC-88 ( 22 ) 2020.3
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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スマー トウォッチにおけるジェスチャを用いた個人認証方式の提案と評価
長友 誠、小関朋奈，渡辺 一樹、油田 健太郎、岡崎 直宣、朴 美娘
2020 Symposium on Cryptography and Information Security (SCIS2020) ( 1E2-1 ) 2020.1
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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ブロックチェーンを用いた不正ログイン対策の検討
藤 竜成, 臼崎 翔太郎, 油田 健太郎, 朴 美娘, 白鳥 則郎, 岡崎 直宣
CSS2019 1336 - 1342 2019.10
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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ブロックチェーンを用いた分散機械学習におけるパラメータ異常検知システムの提案
長友 誠, 油田 健太郎, 岡崎 直宣, 朴 美娘
CSS2019 1343 - 1348 2019.10
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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複数ウィンドウサイズの効率的監視によるバースト形態に依らないDDoS攻撃検出手法の検討
臼崎 翔太郎, 油田 健太郎, 山場 久昭, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2019）論文集 495 - 504 2019.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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スマートロックにおける異常検知を用いた二つの端末の加速度による歩行認証の提案 Reviewed
渡辺 一樹, 長友 誠, 油田 健太郎, 岡崎 直宣, 朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2019）論文集 1155 - 1160 2019.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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マーカーを用いたカメラと加速度センサによるセキュアデバイスペアリング手法の評価
長友 誠, 油田 健太郎, 岡崎 直宣, 朴 美娘
IPSJ SIG Technical Reports IPSJ-CSEC-85 ( 7 ) 2019.5
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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スケジュール・ネットワーク全体に分散するフロートの包括的評価
高塚 佳代子，富田 旋，高橋 尚己，佐藤 知一，岡崎 直宣
化学工学会第84年会講演予稿集 I-206 2019.3
Language：Japanese Publishing type：Research paper (other academic)
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スマートホーム内のIoT機器を対象としたサイバー攻撃への耐性評価
坂本 憲理，長友 誠，岡崎 直宣，朴 美娘
IPSJ SIG Technical Reports 2019-SPT-32 ( 24 ) 1 - 8 2019.2
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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覗き見耐性を持つ小型タッチスクリーン端末における個人認証方式の提案
長友 誠，渡辺 一樹，油田 健太郎，岡崎 直宣，朴 美娘
2019 Symposium on Cryptography and Information Security (SCIS2019) 3E4-2 2019.1
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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スライドウィンドウを利用したエントロピー手法による軽量なDDoS攻撃検知手法の検討
臼崎 翔太郎，山場 久昭，油田 健太郎，岡崎 直宣
IPSJ SIG Technical Reports 2018-ITS-75 ( 7 ) 1 - 3 2018.11
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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青島地区における避難者の歩行速度を考慮した災害時の避難行動に関するシミュレーション
本田 佳鈴，山場 久昭，油田 健太郎，岡崎 直宣
IPSJ SIG Technical Reports 2018-ITS-75 ( 19 ) 1 - 8 2018.11
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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被疑クライアントのHTTPリクエスト送信挙動に基づいたボット判定手法
藤 竜成 ，山場 久昭，油田 健太郎，岡崎 直宣
IPSJ SIG Technical Reports 2018-ITS-75 ( 10 ) 1 - 5 2018.11
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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眼位異常判定プロセスの判定基準について
平田 木乃美，内田 憲之，松本 亜沙美，川上 真矢，高塚 佳代子，椋木 雅之，岡崎 直宣
電子情報通信学会技術研究報告 118 ( 270 ) 67 - 72 2018.10
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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プロジェクトのスケジュール・ネットワークの遅延リスク耐性の評価
富田 旋，高塚 佳代子，高橋 尚己，佐藤 知一，岡崎 直宣
日本経営工学会2018年秋季大会講演会論文集 85 - 86 2018.10
Language：Japanese Publishing type：Research paper (other academic)
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覗き見耐性を持つマウス操作と数字盤を組み合わせた個人認証方式の提案と評価
坂本 憲理，長友 誠，岡崎 直宣，朴 美娘
コンピュータセキュリティシンポジウム（CSS2018）論文集 165 - 172 2018.10
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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スマートフォンとウェアラブル端末の加速度センサーを用いたスマートロックにおける歩行認証の検討
渡辺 一樹，長友 誠，油田 健太郎，岡崎 直宣，朴 美娘
コンピュー タセキュリティシンポジウム（CSS2018）論文集 173 - 178 2018.10
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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スマートロックにおける二端末の加速度を用いた歩行状態による本人認証の検討
渡辺 一樹，長友 誠，油田 健太郎，岡崎 直宣，朴 美娘
FIT2018(第17 回情報科 学技術フォーラム) 論文集 ( 4 ) 137 - 140 2018.9
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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口蹄疫感染リスクと防疫予算とのトレードオフを定量的に扱うための手法
高塚 佳代子，関口 敏，椋木 雅之，岡崎 直宣
化学工学会第50回秋季大会論文集 EA204 2018.9
Language：Japanese Publishing type：Research paper (other academic)
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カメラと加速度センサを用いたデバイスペアリング方式の提案とその評価 Reviewed
長友 誠, 油田 健太郎, 岡崎 直宣, 朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2018）論文集 172 - 178 2018.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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クライアントのHTTPリクエスト送信動作に着目したボット検知手法の検討 Reviewed
藤 竜成, 油田 健太郎, 山場 久昭, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2018）論文集 897 - 904 2018.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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色恒常性を利用したカラー CAPTCHA の検討 Reviewed
臼崎 翔太郎, 油田 健太郎, 山場 久昭, 椋木 雅之, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2018）論文集 664 - 671 2018.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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ランダム性を持ったあみだくじ型視線認証の検討 Reviewed
宮崎 翔吾, 油田 健太郎, 山場 久昭, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2018）論文集 657 - 663 2018.7
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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眼位検査中の眼球動画像に基づく眼位異常判定プロセスの開発
平田木乃美，内田憲之，日隈光基，高塚佳代子，椋木雅之，岡崎直宣
2018年電子情報通信学会総合大会論文集 ( H-4-15 ) 1 - 1 2018.3
Language：Japanese Publishing type：Research paper (other academic)
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スケジュールのロバスト性をフロートの解空間の大きさで評価する方法について
高塚 佳代子，佐藤 知一，山場 久昭，油田 健太郎，岡崎 直宣
化学工学会第49回秋季大会 AF204 2017.9
Language：Japanese Publishing type：Research paper (other academic)
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受信信号強度を用いたデバイス認証における異常値除去手法に関する検討 Reviewed
堀 孝浩, 喜多 義弘, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2017）論文集 217 - 222 2017.6
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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DPIを用いたIoT機器向け不正侵入検知システムの検討 Reviewed
油田 健太郎, 山場 久昭, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2017）論文集 1627 - 1634 2017.6
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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リアルタイムバースト検出手法の利用による即応性を考慮したDDoS攻撃検知手法の検討 Reviewed
臼崎 翔太郎, 有川 佑樹, 山場 久昭, 油田 健太郎, 久保田 真一郎, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2017）論文集 1411 - 1419 2017.6
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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3Dグラスを用いた簡易な眼位検査システムの開発に向けて
高塚 佳代子, 高橋 弘季, 関口 敏, 山場 久昭, 久保田 真一郎, 岡崎 直宣
2017年電子情報通信学会総合大会論文集 ( H-4 ) 4 - 4 2017.3
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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Wi-Fiの受信信号強度を用いた近接検出による認証方式に関する一検討
堀 孝浩，西郡裕子，朴 美娘，岡崎直宣
情報処理学会第79回全国大会 ( 3W-4 ) 2017.3
Language：Japanese Publishing type：Research paper (other academic)
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Random Forest による実用化に向けたリズム認証の実験評価
堀 孝浩, 喜多 義弘, 朴 美娘, 岡崎 直宣
2017 Symposium on Cryptography and Information Security (SCIS2017) ( 1B2-1 ) 2017.1
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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Takatsuka Kayoko, Sekiguchi Satoshi, Yamaba Hisaaki, Kubota Shinichiro, Okazaki Naonobu
KAGAKU KOGAKU RONBUNSHU 43 ( 2 ) 117 - 122 2017
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Chemical Engineers, Japan
<p>Foot-and-mouth disease (FMD), a "specific domestic animal infectious disease," needs biosecurity in the early stage but cannot be detected during the incubation period. This problem is dealt with by use of a detection agent and by immediate culling when the outbreak begins. However, developing a detection agent raises budgetary problems, and securing sites for culling and burial takes time. In this study, we adopted an epidemiological model known as the Keeling Model and developed a mathematical method to detect infected farms during the incubation period before clinical symptoms first appear. Our model based on the Keeling Model estimates the unobservable variate λ (the infection index), which indicates the situation of the susceptible farms with the observable variates of whether or not surrounding farms infected, the number and species of animals, and the distances between farms. In addition, we devised a model (Infection Estimating Model) and an estimation approach to estimate whether or not a farm is infected. The proposed method was applied to the case of FMD that occurred in Miyazaki Prefecture in 2010, and the validity of our proposal was confirmed. Moreover, as a result of an experiment to compare estimation accuracy, a universal factor was discovered that will improve estimation accuracy.</p>
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Improvement of Farmers Market Information System to Connect with Some Social Stakeholders
Isakwisa Gaddy TENDE，橘 弘智，岡崎直宣，山場久昭，高塚佳代子，久保田真一郎
第69回電気・情報関係学会九州支部連合大会論文集 ( 11-1P-05 ) 2016.9
Language：English Publishing type：Research paper (conference, symposium, etc.)
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リアルタイムバースト検出手法を利用したパケット到着間隔によるDDoS攻撃検知手法の検討
臼崎翔太郎，橘 弘智，有川佑樹，高塚佳代子，山場久昭，久保田真一郎，岡崎直宣
第69回電気・情報関係学会九州支部連合大会論文集 ( 06-2A-06 ) 2016.9
Language：Japanese Publishing type：Research paper (conference, symposium, etc.)
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ランダム出題オンラインテスト結果をもとにしたS-P表分析
久保田真一郎，新盛賢太郎，高塚佳代子，山場久昭, 岡崎直宣
教育システム情報学会第41回全国大会論文集 JSiS2016 ( I1-20 ) 39 - 40 2016.8
Language：Japanese Publishing type：Research paper (other academic)
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周囲の状況に適応する統合的認証方式での状況判定法の精度向上について
山場久昭，長野裕孝，高塚佳代子，久保田真一郎，岡崎直宣
宮崎大學工學部紀要 45 243 - 248 2016.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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口蹄疫の潜伏期にある農場を推定する手法の提案
高塚佳代子，高橋弘季，山場久昭，久保田真一郎，岡崎直宣
宮崎大學工學部紀要 45 249 - 253 2016.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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口蹄疫感染地域において潜伏期にある感染農場検出のための数理学的手法の開発
高塚 佳代子, 高橋 弘季, 関口 敏, 山場 久昭, 久保田 真一郎, 岡崎 直宣
化学工学会第81年回 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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Development of Farmers Market Information System to connect with some social Stakeholders
Isakwisa Gaddy Tende, 橘 弘智, 岡崎 直宣, 山場, 久昭, 高塚 佳代子, 久保田 真一郎
情報処理学会第78回全国大会 2016.3
Language：English Publishing type：Research paper (other academic)
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匿名通信システムにおけるランダム擬似アクセスを用いた指紋攻撃対策手法に関する一検討
宗 裕文, 富田 旋, 横山 絵美里, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会火の国情報シンポジウム2016論文集 ( 1A-1 ) 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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プリント教材とLMS連携による学習者解答に基づく学習支援の検討
岩間 隆造, 岡崎 直宣, 山場 久昭, 高塚 佳代子, 久保田 真一郎
情報処理学会火の国情報シンポジウム2016論文集 ( 2C-4 ) 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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パズル型認証方式の録画攻撃耐性の一検討
日隈光 基, 臼崎 翔太郎, 喜多 義弘, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会火の国情報シンポジウム2016論文集 ( 2A-1 ) 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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マウストラッキングを用いたCAPTCHAの検討
立田 怜平, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会火の国情報シンポジウム2016論文集 ( 1A-4 ) 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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OpenFlowによるネットワーク制御と擬陽性排除サーバを用いたDDoS攻撃緩和手法の検討
有川 佑, 岡崎 直宣, 山場 久昭, 高塚 佳代子, 久保田 真一郎
情報処理学会火の国情報シンポジウム2016論文集 ( 1A-3 ) 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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匿名通信システムにおける複数経路を用いた指紋攻撃対策手法に関する一検討
横山 絵美里, 平田 木乃美, 宗 裕文, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会火の国情報シンポジウム2016論文集 ( 1A-2 ) 2016.3
Language：Japanese Publishing type：Research paper (other academic)
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スマートフォン個人認証のための非拘束非接触型掌紋認証アルゴリズム
大脇 啓吾, 久保田 真一郎, 岡崎 直宣, 山場 久昭, 高塚 佳代子
情報処理学会第78回MBL研究会 2015-MBL-78 2016.2
Language：Japanese Publishing type：Research paper (other academic)
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録画画像を用いた攻撃に耐性を持つパズル型認証方式の一検討
日隈光基, 喜多義弘, 山場久昭, 久保田真一郎, 朴美娘, 岡崎直宣
情報処理学会研究報告 2015-SPT-15 ( 4 ) 1 - 6 2015.9
Language：Japanese Publishing type：Research paper (other academic)
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表面筋電位計を用いた個人認証システムの実現に向けた検討
黒木聡舜, 山場久昭, 久保田真一郎, 片山徹郎, 朴美娘, 岡崎直宣
情報処理学会研究報告 2015-SPT-15 ( 5 ) 1 - 6 2015.9
Language：Japanese Publishing type：Research paper (other academic)
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感染症の潜伏期間にある可能性を農場単位で推定するための方法論の検討
高橋弘季, 高塚 佳代子, 関口, 敏, 山場 久昭, 久保田 真一郎,岡崎 直宣
計測自動制御学会システム・情報部門第58回離散事象システム研究会（DES58） DES58 22 - 27 2015.9
Language：Japanese Publishing type：Research paper (other academic)
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「遅延許容領域」に基づくプロジェクト管理手法のPERT手法に対する優位性について
高塚 佳代子, 山場 久昭, 久保田 真一郎, 岡崎 直宣
化学工学会第47回秋季大会 2015.9
Language：Japanese Publishing type：Research paper (other academic)
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NFC スキャンからLMSまでシームレスに出席情報を記録可能なAndroidアプリの開発
橘 弘智，久保田 真一郎，山場 久昭，高塚 佳代子，岡崎 直宣
教育システム情報学会第40回全国大会論文集 JSiS2015 ( SP-7 ) 253 - 254 2015.9
Language：Japanese Publishing type：Research paper (other academic)
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LMSへの出席情報記録および連続欠席者提示を行う出席管理アプリ
橘 弘智, 久保田 真一郎, 山場 久昭, 高塚 佳代子, 岡崎 直宣
情報処理学会情報教育シンポジウム（SSS2015） 2015.8
Language：Japanese Publishing type：Research paper (other academic)
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IoT環境におけるREST通信のためのCoAPとHTTPの選択指標に関する検討 Reviewed
溝上 紘史, 久保田 真一郎, 山場 久昭, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2015）論文集 547 - 552 2015.7
Language：Japanese Publishing type：Research paper (other academic)
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検索可能暗号におけるブルームフィルタを応用した検索方式の提案
佐保 航輝, 油田 健太郎, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会研究報告 2015-CSEC-69 ( 8 ) 1 - 7 2015.5
Language：Japanese Publishing type：Research paper (other academic)
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表面筋電位を用いた個人認証手法の実現に向けた基礎研究
山場 久昭, 長友 想, 油田健太郎, 久保田 真一郎, 片山 徹郎, 朴 美娘, 岡崎 直宣
情報処理学会研究報告 2015-CSEC-69 ( 32 ) 1 - 6 2015.5
Language：Japanese Publishing type：Research paper (other academic)
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Winnyネットワークにおけるキーの生存時間とノード数を考慮したインデックスポイゾニングの評価
山本 碧, 油田 健太郎, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会研究報告 2015-CSEC-69 ( 26 ) 1 - 7 2015.5
Language：Japanese Publishing type：Research paper (other academic)
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IPSJ Journal 56 ( 3 ) 808 - 818 2015.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
A reversal turing test called CAPTCHA is used in many webservice sites to prevent the automatic program called bots from making unauthorized accounts. The CAPTCHA with images of correct answer string, called as the text-based CAPTCHA, is widely prevalent because of an ease implementing in the website. The optical character recognition technologies enable bots solve the text-based CAPTCHA automatically. Any researchers have pointed out the vulnerability of the text-based CAPTCHA. Absorbing the vulnerability of the text-based CAPTCHA, the image-based CAPTCHA is proposed, which use the human abilities to discern objects in images. However, the existing image-based CAPTCHAs also have problems about usability and robustness. In this paper, we propose a new image-based CAPTCHA using images without a correct answer string and with obstruction figures, to achieve high usability and robustness. In order to confirm a effectiveness of the proposed method, we argue to absorb some considerable attacks in the image-based CAPTCHA, and conduct assessment of usability through our questionnaire. The results show that the proposed system absorb the attacks adequately and has usability.
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B-6-36 A Proposal of Rhythm Authentication Method using Fluctuation of Threshold
Ozaki Koushiro, Kita Yoshihiro, Park Mirang, Okazaki Naonobu
Proceedings of the IEICE General Conference 2015 ( 2 ) 2015.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
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自己組織化マップを利用したリズム認証における個人分類手法の提案 Reviewed
喜多 義弘, 朴 美娘, 岡崎 直宣
電子情報通信学会第4回バイオメトリクスと認識・認証シンポジウム論文集 2014.11
Language：Japanese Publishing type：Research paper (other academic)
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匿名通信システムTorにおける悪用ユーザ推定手法の精度に関する検討
宗 裕文, 和斉 薫, 横山 絵美里, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会研究報告 2014-MBL-73 ( 22 ) 1 - 7 2014.11
Language：Japanese Publishing type：Research paper (other academic)
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安全性強度を柔軟に設定できるモバイル端末向け個人認証方式の一検討
和斉 薫, 宗 裕文, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会研究報告 2014-MBL-73 ( 23 ) 1 - 9 2014.11
Language：Japanese Publishing type：Research paper (other academic)
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ユーザの慣れによる認証精度の低下を考慮したリズム認証方式の提案 Reviewed
喜多 義弘, 朴 美娘, 岡崎 直宣
情報処理学会コンピュータセキュリティシンポジウム（CSS2014）論文集 1034 - 1041 2014.10
Language：Japanese Publishing type：Research paper (other academic)
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マルチアイテム環境におけるコールドデータの効率的提供手法の提案 Reviewed
油田 健太郎, 山場 久昭，朴 美娘，岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2014）論文集 301 - 308 2014.7
Language：Japanese Publishing type：Research paper (other academic)
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自己組織化マップを利用したリズム認証方式とその認証精度に関する考察 Reviewed
喜多 義弘，神里 麗葉，朴 美娘，岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2014）論文集 1011 - 1018 2014.7
Language：Japanese Publishing type：Research paper (other academic)
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タッチスクリーンを利用した覗き見耐性を持つパズル型認証方式の提案 Reviewed
増田 裕仁, 喜多 義弘, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2014）論文集 1005 - 1010 2014.7
Language：Japanese Publishing type：Research paper (other academic)
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仮想ピアを用いたP2Pネットワークの効率的な共有フィルタ管理手法の提案 Reviewed
佐久間 政碩, 喜多 義弘, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2014）論文集 997 - 1004 2014.7
Language：Japanese Publishing type：Research paper (other academic)
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匿名通信システムにおける悪用ユーザ特定手法の検討 Reviewed
宗 裕文, 横山 絵美里,山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2014）論文集 506 - 513 2014.7
Language：Japanese Publishing type：Research paper (other academic)
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匿名通信システムTorに対する指紋攻撃とその対策に関する検討 Reviewed
横山 絵美里, 宗 裕文, 山場 久昭, 久保田 真一郎, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2014）論文集 498 - 505 2014.7
Language：Japanese Publishing type：Research paper (other academic)
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パズル型認証方式の録画攻撃耐性に関する考察
喜多 義弘，朴 美娘，岡崎 直宣
情報処理学会研究報告 2014-BioX-114 ( 83 ) 1 - 5 2014.6
Language：Japanese Publishing type：Research paper (other academic)
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A Study of Recording Attack Resistance of the Puzzle Authentication
KITA Yoshihiro, PARK Mirang, OKAZAKI Naonobu
Technical Committee on Biometrics 114 ( 83 ) 1 - 5 2014.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
Recently, mobile terminals such as smartphones have come into widespread use. Most of such mobile terminals store several types of important data, such as personal information. Therefore, it is necessary to lock and unlock terminals using a personal authentication method such as personal identification number (PINs) in order to prevent data theft. However, most existing authentication methods have a common problem referred to here as "shoulder-surfing," in which authentication information is covertly obtained by a person watching "over-the-shoulder" of a user as he/she completes the authentication sequence. In this paper, a puzzle authentication method that is simple but sufficiently secure even when the authentication sequence is being watched is proposed. The proposed method is implemented on a mobile terminal and is evaluated about the recording attack resistance.
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Winnyネットワークにおけるクラスタリングを用いたインデックスポイゾニングの検討(サービス管理,運用管理技術,セキュリティ管理及び一般)
油田 健太郎, 山場 久昭, 朴 美娘, 岡崎 直宣
電子情報通信学会技術研究報告. ICM, 情報通信マネジメント 114 ( 43 ) 153 - 161 2014.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人電子情報通信学会
現在,P2Pファイル共有ネットワークが世界中で利用されている.しかし,その多くはファイルの流通制御をもたないため,著作権侵害ファイルの流通やコンピュータウイルスによる個人情報の流出などが社会問題となっている.その解決策としてインデックスポイゾニングと呼ばれるファイル流通制御方式が研究されている.しかし,P2Pファイル共有ネットワークヘインデックスポイゾニングを適用する際に,トラフィックの増大やインデックスの汚染などの問題が発生することが確認されている.そこで本論文では,ファイルの流通制御を低下させることなく,それらの問題を解決する手法として,動的なクラスタリングを提案することで従来手法を改善し,その一部をWinnyネットワーク向けに実装することで,提案手法の有効性を評価する.
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マルチタッチ操作を利用したリズム認証方式の検討 (モバイルネットワークとアプリケーション)
喜多 義弘, 神里 麗葉, 朴 美娘, 岡崎 直宣
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 113 ( 495 ) 259 - 265 2014.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人電子情報通信学会
スマートフォンなどのモバイル端末の普及に伴い,端末内の個人情報の漏洩が問題視されている.そのため,多くのモバイル端末には画面ロック機能が搭載され,その解除認証に暗証番号やパターンなどの認証方式が利用されている.しかし,既存の認証方式では,認証動作の覗き見や録画・解析する攻撃方法への耐性がないものが多く,認証情報が他人にばれてしまう危険性がある.本研究では,認証の際,画面を見る必要がなく,認証動作を人の目や録画機器の下に曝さないで行うことのできるリズム認証方式に注目し,そこで課題となっていた認証精度の向上を図るための手法について検討する.具体的には,ユーザが画面上を複数の指でタップし,そのタップ情報と自己組織化マップを照合しながらユーザ個人を識別する.複数の指でタップすることで,認証に用いることができる特徴量が増え,それらを有効に利用することで認証精度が向上することを示す.
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喜多義弘 , 神里麗葉 , 朴美娘 , 岡崎直宣
情報処理学会研究報告. UBI, [ユビキタスコンピューティングシステム] 2014 ( 19 ) 1 - 7 2014.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人情報処理学会
スマートフォンなどのモバイル端末の普及に伴い,端末内の個人情報の漏洩が問題視されている.そのため,多くのモバイル端末には画面ロック機能が搭載され,その解除認証に暗証番号やパターンなどの認証方式が利用されている.しかし,既存の認証方式では,認証動作の覗き見や録画・解析する攻撃方法への耐性がないものが多く,認証情報が他人にばれてしまう危険性がある.本研究では,認証の際,画面を見る必要がなく,認証動作を人の目や録画機器の下に曝さないで行うことのできるリズム認証方式に注目し,そこで課題となっていた認証精度の向上を図るための手法について検討する.具体的には,ユーザが画面上を複数の指でタップし,そのタップ情報と自己組織化マップを照合しながらユーザ個人を識別する.複数の指でタップすることで,認証に用いることができる特徴量が増え,それらを有効に利用することで認証精度が向上することを示す.
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マルチタップ操作を利用したリズム認証方式の検討
喜多 義弘，朴 美娘，岡崎 直宣
情報処理学会研究報告 2014-MBL-70 ( 19 ) 1 - 7 2014.3
Language：Japanese Publishing type：Research paper (other academic)
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Torネットワークにおける悪用ユーザ特定手法の検討
宗 裕文，横山 絵美里，川端 良樹，久保田真一郎，岡崎 直宣
情報処理学会火の国情報シンポジウム2014論文集 ( 2B-1 ) 1 - 7 2014.3
Language：Japanese Publishing type：Research paper (other academic)
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ユーザが抱く印象を用いた個人嗜好の表現－Folksonomyを利用したユーザの印象の推測方法－
田上 道士，山場 久昭，高塚 佳代子，岡崎 直宣，冨田 重幸
情報処理学会火の国情報シンポジウム2014論文集 ( 5B-3 ) 1 - 8 2014.3
Language：Japanese Publishing type：Research paper (other academic)
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匿名通信システムTorにおける指紋攻撃とその対策の検討
横山 絵美里，宗 裕文，川端 良樹，久保田真一郎，岡崎 直宣
情報処理学会火の国情報シンポジウム2014論文集 ( 2B-2 ) 1 - 8 2014.3
Language：Japanese Publishing type：Research paper (other academic)
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D-19-2 A Proposal of Filter Sharing Method Using Virtual peer of P2P
Sakuma Masahiro, Kita Yoshihiro, Park Mirang, Okazaki Naonobu
Proceedings of the IEICE General Conference 2014 ( 2 ) 2014.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
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Android OSにおける不正アプリケーション取得防止のためのセキュリティ評価システムの提案 Reviewed
喜多 義弘，久保田 真一郎，朴 美娘，岡崎 直宣
情報処理学会コンピュータセキュリティシンポジウム（CSS2013）論文集 208 - 214 2013.10
Language：Japanese Publishing type：Research paper (scientific journal)
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文字認識攻撃に耐性をもつランダム妨害図形を用いた画像ベースCAPTCHA方式の検討 Reviewed
田村拓己, 久保田真一郎, 朴美娘, 岡崎直宣
情報処理学会コンピュータセキュリティシンポジウム（CSS2013）論文集 925 - 932 2013.10
Language：Japanese Publishing type：Research paper (scientific journal)
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仮想ピアを用いたクラスタリングにおけるフィルタ共有手法の提案 Reviewed
佐久間 政碩，喜多 義弘，朴 美娘，岡崎 直宣
情報処理学会コンピュータセキュリティシンポジウム（CSS2013）論文集 862 - 869 2013.10
Language：Japanese Publishing type：Research paper (scientific journal)
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モバイル端末に適したアイコンを用いた個人認証方式の録画攻撃耐性とユーザビリティに関する考察 Reviewed
和斉 薫，菅井 文郎，喜多 義弘，久保田 真一郎，朴 美娘，岡崎 直宣
情報処理学会コンピュータセキュリティシンポジウム（CSS2013）論文集 700 - 707 2013.10
Language：Japanese Publishing type：Research paper (scientific journal)
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RL-002 A Study of Video-Analysis-Hack Resistant for STDS Authentication Method
Kita Yoshihiro, Sugai Fumio, Park MiRang, Okazaki Naonobu, Nishimura Hiromitsu, Torii Hideyuki, Okamoto Takeshi
12 ( 4 ) 7 - 14 2013.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Forum on Information Technology
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人感センサの時系列情報を用いた徘徊者発見支援システム
菅井 文郎，山分 愛，萬屋 翔平，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 271 - 275 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Serendipityを考慮した推薦システムのFolksonomyによる実現とその評価
田上 道士，山場 久昭，高塚 佳代子，岡崎 直宣，冨田 重幸
宮崎大学工学部紀要 ( 42 ) 313 - 318 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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“Matrix-Based Discrete-Event System Controller"を拡張するためのETSCから時間ペトリネットへの変換手法とその統一的支援システム
北野 翔一郎，山場 久昭，高塚 佳代子，片山 徹郎，岡崎 直宣，冨田 重幸
宮崎大学工学部紀要 ( 42 ) 319 - 325 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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センサネットワーク構築支援アプリケーションの試作
菅井 文郎，山分 愛，萬屋 翔平，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 303 - 306 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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バイブレーションを用いた覗き見耐性を持つモバイル端末向け認証方式の提案
菅井 文郎，Savatdy Santisouk，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 307 - 311 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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アイコンとフリック入力を用いた覗き見耐性を持つ認証方式の提案
菅井 文郎，和斉 薫，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 297 - 302 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Peer to Peerシステムにおける不正コンテンツ拡散抑制手法に関する研
池田 匡視，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 289 - 295 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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センサネットワークを用いた屋内における避難誘導補助システム
菅井 文郎，本村 充，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 283 - 287 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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ランダム妨害図形を用いた画像ベースCAPTCHA方式の研究
池田 匡視，田村 拓己，岡崎 直宣
宮崎大学工学部紀要 ( 42 ) 277 - 281 2013.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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ランダム妨害図形を用いた画像ベースCAPTCHA方式の提案 Reviewed
田村 拓己, 菅井 文郎, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2013）論文集 222 - 229 2013.7
Language：Japanese Publishing type：Research paper (other academic)
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モバイル端末に適したアイコンを用いた個人認証方式の録画耐性とユーザビリティに関する検討 Reviewed
和斉 薫, 菅井 文郎, 喜多 義弘, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2013）論文集 1362 - 1369 2013.7
Language：Japanese Publishing type：Research paper (other academic)
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ユーザ主体によるAndroidアプリケーションのレビュー評価システムの提案 Reviewed
喜多 義弘, 菅井 文郎, 朴 美娘, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2013）論文集 1341 - 1347 2013.7
Language：Japanese Publishing type：Research paper (other academic)
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Serendipityを考慮した推薦システムのFolksonomyによる実現とその評価
田上 道士，山場 久昭，高塚 佳代子，岡崎 直宣，冨田 重幸
情報処理学会火の国情報シンポジウム2013論文集 ( B-2-5 ) 1 - 6 2013.3
Language：Japanese Publishing type：Research paper (other academic)
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アイコンとフリック入力を用いた覗き見耐性を持つ認証方式の検討
和斉 薫，菅井 文郎，喜多 義弘，朴 美娘，岡崎 直宣
情報処理学会火の国情報シンポジウム2013論文集 ( A-2-1 ) 1 - 6 2013.3
Language：Japanese Publishing type：Research paper (other academic)
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“Matrix-Based Discrete-Event System Controller”を拡張するためのETSCから時間ペトリネットへの変換手法とその統一的支援システム
北野 翔一郎，山場 久昭，高塚 佳代子，片山 徹郎，岡崎 直宣，冨田 重幸
情報処理学会火の国情報シンポジウム2013論文集 ( B-2-4 ) 1 - 6 2013.3
Language：Japanese Publishing type：Research paper (other academic)
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人感センサの時系列情報を用いたプライバシに配慮した徘徊者発見支援システムの検討
山分 愛，萬家 翔平，菅井 文郎，岡崎 直宣
情報処理学会火の国情報シンポジウム2013論文集 ( B-5-4 ) 1 - 6 2013.3
Language：Japanese Publishing type：Research paper (other academic)
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ランダム妨害図形を用いた画像ベースCAPTCHA方式の検討
田村 拓己，川端 良樹，池田 匡視，岡崎 直宣
情報処理学会火の国情報シンポジウム2013論文集 ( A-2-2 ) 1 - 6 2013.3
Language：Japanese Publishing type：Research paper (other academic)
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バイブレートパターンを用いた覗き見耐性を持つパスワード認証方式の提案と実装
喜多 義弘, 朝貝 洸紀, 菅井 文郎，朴 美娘，岡崎 直宣
2013年 暗号と情報セキュリティシンポジウ(SCIS2013)論文集 ( 2D4-3 ) 1 - 7 2013.1
Language：Japanese Publishing type：Research paper (other academic)
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モバイル端末における覗き見耐性を持つ認証方式の提案と実装
喜多 義弘, 菅井 文郎，朴 美娘，岡崎 直宣
第2回バイオメトリクスと認識・認証シンポジウム論文集 ( A2-2 ) 1 - 7 2012.11
Language：Japanese Publishing type：Research paper (other academic)
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モバイル端末における覗き見対策を持つ認証方式の提案と実装
喜多 義弘, 菅井 文郎, 朴 美娘, 岡崎 直宣
コンピュータセキュリティシンポジウム2012(CSS2012)論文集 2012 ( 3 ) 413 - 420 2012.10
Language：Japanese Publishing type：Research paper (other academic)
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IPトレースバックにおけるパケットマーキング方式に対する妨害攻撃とその対策に関する研究
池田 匡視，川端 良樹，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 199 - 204 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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センサネットワークにおける低消費電力型データ転送方式の提案
岩河 信之，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 253 - 260 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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センサネットワークにおける低消費電力型データ転送方式の評価
池田 匡視，濱邉 康彰，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 247 - 252 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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アイコンとタッチパネル液晶を用いた覗き見耐性を持つ認証方式についての一検討
池田 匡視，菅井 文郎，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 241 - 246 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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P2Pを用いたビデオストリーミング配信システムの効率化に関する研究
池田 匡視，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 233 - 240 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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フィールドにおけるセンシング情報を用いた視覚的な誘導支援システムの開発
井下 善博，田畑 真奈美，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 227 - 232 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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MANET における位置情報を用いた経路探索手法の提案
池田 匡視，鮫島 周平，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 221 - 226 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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push型セッションを用いたP2Pストリーミング配信手法に関する研究
鮫島 慎治，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 213 - 220 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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3Dディスプレイにおける立体視可能領域最適化に関する研究
池田 匡視，宮崎 貴大，岡崎 直宣
宮崎大学工学部紀要 ( 41 ) 205 - 212 2012.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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IPトレースバックにおける偽装マーキング攻撃に関する一検討 Reviewed
川端 良樹，油田 健太郎，山場 久昭，朴 美娘，岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2012）論文集 764 - 774 2012.7
Language：Japanese Publishing type：Research paper (other academic)
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モバイル端末における覗き見対策を持つ認証方式の提案と実装 Reviewed
喜多 義弘, 菅井 文郎, 朴 美娘, 岡崎 直宣
情報処理学会コンピュータセキュリティシンポジウム2012(CSS2012)論文集 2012 ( 3 ) 413 - 420 2012.7
Language：Japanese Publishing type：Research paper (other academic)
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アイコンとタッチパネル液晶を用いた覗き見耐性を持つ認証方式の提案 Reviewed
菅井 文郎，油田 健太郎，山場 久昭，朴 美娘，岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2012）論文集 2402 - 2409 2012.7
Language：Japanese Publishing type：Research paper (other academic)
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隣接端末数に基づく経路維持率の向上を目的とした経路構築手法の提案と評価 Reviewed
油田 健太郎，山場 久昭，岡崎 直宣，朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2012）論文集 1666 - 1673 2012.7
Language：Japanese Publishing type：Research paper (other academic)
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Proposal of a Video Streaming Protocol to Reduce Wait Time on Peer-to-Peer Systems Reviewed
池田 匡視，油田 健太郎，山場 久昭，朴 美娘，岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2012）論文集 1206 - 1214 2012.7
Language：English Publishing type：Research paper (other academic)
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アイコンとタッチパネル液晶を用いた覗き見耐性を持つ認証方式についての一検討
菅井 文郎，池田 匡視，岡崎 直宣，朴 美娘
情報処理学会火の国情報シンポジウム2012論文集 ( C-2-3 ) 1 - 6 2012.3
Language：Japanese Publishing type：Research paper (other academic)
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パケットマーキング方式に対する妨害攻撃とその対策に関する一検討
川端良樹，岡崎 直宣，池田 匡視
情報処理学会火の国情報シンポジウム2012論文集 ( C-3-2 ) 1 - 6 2012.3
Language：Japanese Publishing type：Research paper (other academic)
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隣接端末数に基づく端末の分布の偏りを考慮した経路構築手法の一検討
徳丸 翔吾，稲葉 健吾，油田 健太郎，岡崎 直宣
情報処理学会第74回全国大会論文集 ( 3W-2 ) 1 - 2 2012.3
Language：Japanese Publishing type：Research paper (other academic)
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P2P上の評判値を用いた悪意のあるコンテンツ抑制手法の評価
大野 泰弘，江藤 大，油田 健太郎，岡崎 直宣
情報処理学会第74回全国大会論文集 ( 2Y-7 ) 1 - 2 2012.3
Language：Japanese Publishing type：Research paper (other academic)
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k重被覆における省電力化のためのレイヤ作成手法の検討
山内 龍之介，江藤 大，油田 健太郎，岡崎 直宣
情報処理学会第74回全国大会論文集 ( 1X-2 ) 1 - 2 2012.3
Language：Japanese Publishing type：Research paper (other academic)
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隣接端末を用いた経路構築手法における輻輳制御方式の一検討
武藤 一史，稲葉 健吾，油田 健太郎，岡崎 直宣
情報処理学会第74回全国大会論文集 ( 3W-3 ) 1 - 2 2012.3
Language：Japanese Publishing type：Research paper (other academic)
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P2PストリーミングにおけるNAT越えを考慮した配信木構築手法の検討
鮫島 慎治，菅井 文郎，池田 匡視，岡崎 直宣，朴 美娘
情報処理学会研究報告 2011-MBL-60 ( 12 ) 1 - 6 2011.11
Language：Japanese Publishing type：Research paper (other academic)
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フィールドにおける作業支援のためのセンサ情報可視化システムの検討
田畑 真奈美，井下 善博，岡崎 直宣
第64回電気関係学会九州支部連合大会論文集 ( 07-2P-10 ) 1 - 2 2011.9
Language：Japanese Publishing type：Research paper (other academic)
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P2PストリーミングにおけるNAT越えを考慮した配信木構築プロトコルの検討
鮫島 慎治，岡崎 直宣
第64回電気関係学会九州支部連合大会論文集 ( 13-2P-05 ) 1 - 2 2011.9
Language：Japanese Publishing type：Research paper (other academic)
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P2PストリーミングにおけるNAT越えを考慮した配信システムの検討
菅井 文郎，鮫島 慎治，岡崎 直宣
第64回電気関係学会九州支部連合大会論文集 ( 13-2P-04 ) 1 - 2 2011.9
Language：Japanese Publishing type：Research paper (other academic)
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Peer to Peer上の安全なコンテンツ流通システムの提案 Reviewed
油田 健太郎, 岡崎 直宣, 朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2011）論文集 113 - 120 2011.7
Language：Japanese Publishing type：Research paper (other academic)
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P2Pを用いたビデオストリーミング配信システムの効率化に関する検討 Reviewed
池田 匡視, 岡崎 直宣, 朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2011）論文集 99 - 106 2011.7
Language：Japanese Publishing type：Research paper (other academic)
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隣接端末数に基づく経路構築手法の提案
稲葉 健吾，油田 健太郎，岡崎 直宣，朴 美娘
情報処理学会研究報告 2011-MBL-57 ( 23 ) 1 - 7 2011.3
Language：Japanese Publishing type：Research paper (other academic)
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ゾーンに基づく複数経路構築手法の評価
江藤 大，油田 健太郎，岡崎 直宣，朴 美娘
情報処理学会研究報告 2011-MBL-57 ( 24 ) 1 - 6 2011.3
Language：Japanese Publishing type：Research paper (other academic)
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P2P におけるバックボーンネットワーク資源利用の効率化手法の検討
岡崎 直宣，鮫島 慎治
宮崎大学工学部紀要 39 255 - 262 2010.9
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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WWW システムにおけるブログスパム検知手法に関する研究
五島 優美，井下 善博，岡崎 直宣
宮崎大学工学部紀要 39 279 - 286 2010.9
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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ダミーアドレスを用いた電子メール型ワームの感染源特定支援手法の検討
岡崎 直宣，宮地 麻吏
宮崎大学工学部紀要 39 271 - 278 2010.9
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Ｐ２Ｐにおける安全なコンテンツ流通システムの提案
河内 康佑，岡崎 直宣
宮崎大学工学部紀要 39 263 - 270 2010.9
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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アドホックネットワークにおけるゾーン重複のない複数経路構築手法の提案 Reviewed
油田 健太郎，佐原 詩織，岡崎 直宣，冨田 重幸，朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2010）論文集 637 - 644 2010.7
Language：Japanese Publishing type：Research paper (other academic)
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A study of the routing method based on the number of neighbor nodes in ad hoc networks
INABA Kengo, ABURADA Kentaro, OKAZAKI Naonobu
72 ( 0 ) 135 - 136 2010.3
Language：Japanese Publishing type：Research paper (scientific journal)
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A Study of circulation technique of cluster head using restructuring of cluster
OBANA Shiho, ABURADA Kentaro, OKAZAKI Naonobu
72 ( 0 ) 133 - 134 2010.3
Language：Japanese Publishing type：Research paper (scientific journal)
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アドホックネットワークにおけるクラスタリング手法の検討討
尾花志穂，油田健太郎，岡崎 直宣
第１７回電子情報通信学会九州支部学生会講演会論文集 ( B ) 7 - 7 2009.9
Language：Japanese Publishing type：Research paper (other academic)
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アドホックネットワークにおけるゾーンを用いた複数経路構築手法の評価
江藤 大，油田 健太郎，岡崎 直宣
第１７回電子情報通信学会九州支部学生会講演会論文集 ( B ) 6 - 6 2009.9
Language：Japanese Publishing type：Research paper (other academic)
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アドホックネットワークにおけるルーティング手法に関する検討
稲葉 健吾，油田 健太郎，岡崎 直宣
第１７回電子情報通信学会九州支部学生会講演会論文集 ( B ) 8 - 8 2009.9
Language：Japanese Publishing type：Research paper (other academic)
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アドホックネットワークにおけるゾーンを用いた複数経路構築手法の検討 Reviewed
油田 健太郎，佐原 詩織，岡崎 直宣，冨田 重幸，朴 美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2009）論文集 1062 - 1067 2009.7
Language：Japanese Publishing type：Research paper (other academic)
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An estimation of a hop-vector-based routing scheme for data-centric sensor networks
SATO Yusuke, ABURADA Kentaro, OKAZAKI Naonobu, TOMITA Shigeyuki
IPSJ SIG technical reports 2008 ( 94 ) 49 - 56 2008.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
In this paper, we propose a new routing scheme, HVGF (Hop-Vector based Greedy Forwarding) which doesn't need geographic information for data-centric sensor networks. In this scheme, we introduce n base-points, and assign n-dimensional hop-vector, which consists of number of hops from each base-point to the node, to each node. Then, each node forwards packets greedily based on distance between hop-vectors of the node and of destination. The simulation results show that HVGF works well in the low density networks or networks which contain a large void in the center, compared to existing greedy forwarding scheme using information of real geographical location. We also examine the performance of the proposed scheme concerning various number of base points.
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Proposal of a Detection Method of Phishing Site by Decision of Site Movements
Okazaki Naonobu, Goto Yumi
Memoirs of the Faculty of Engineering, Miyazaki University 37 237 - 243 2008.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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Sato Yusuke, Ashikari Ryo, Okazaki Naonobu
Memoirs of the Faculty of Engineering, Miyazaki University 37 253 - 259 2008.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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Kai Kentaro, Kawachi Kousuke, Okazaki Naonobu
Memoirs of the Faculty of Engineering, Miyazaki University 37 245 - 251 2008.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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RL-002 An Examination of a Detection Method of Phishing Site by Decision of Site Movements
Goto Yumi, Okazaki Naonobu
7 ( 4 ) 5 - 8 2008.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Forum on Information Technology
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Kawachi Kosuke, Sato Yusuke, Aburada Kentaro, Okazaki Naonobu, Tomita Shigeyuki
7 ( 4 ) 47 - 50 2008.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Forum on Information Technology
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センサネットワークにおけるHop-Vector を用いたノード位置推定手法の提案 Reviewed
油田健太郎, 河内康佑, 岡崎直宣, 冨田重幸, 朴美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2008）論文集 1058 - 1065 2008.7
Language：Japanese Publishing type：Research paper (other academic)
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センサネットワークにおける回帰分析を用いたノード位置推定手法の検討
油田健太郎, 甲斐健太郎, 河内康佑, 佐藤雄亮, 岡崎直宣, 冨田重幸
情報処理学会火の国情報シンポジウム2008論文集 ( C-6-3 ) 1 - 8 2008.3
Language：Japanese Publishing type：Research paper (other academic)
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データセントリックセンサネットワークにおける位置情報を必要としないルーティング方式の提案 Reviewed
油田健太郎, 佐藤雄亮, 岡崎直宣, 冨田重幸, 朴美娘
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2007）論文集 722 - 732 2007.7
Language：Japanese Publishing type：Research paper (other academic)
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マルチリングネットワークにおける効率的な光パス設定方式に関する検討
朴 美娘, 馬場 義昌, 妹尾 尚一郎, 岡崎 直宣
電子情報通信学会技術研究報告, PN, 107 ( 90 ) 1 - 6 2007.6
Language：Japanese Publishing type：Research paper (other academic)
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A new routing protocol for data-centric sensor networks
SATO Yusuke, ABURADA Kentaro, OKAZAKI Naonobu, TOMITA Shigeyuki, PARK Mi Rang
IEICE technical report 107 ( 39 ) 125 - 130 2007.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
For sensor networks consisting of battery-powered sensor nodes, power saving is significant challenge. It is effective to reduce the amount of communication for sensor networks where power resource is scarce, because sensor nodes consume energy most in communication. We propose a routing protocol, HVGF (Hop-Vector based Greedy Forwarding), which reduces the amount of communication and doesn't need geographic information. In this method, we introduce n base points, and assign n-dimensional hop-vector consist of number of hops from each base point to each nodes. Then, each node forwards packets greedily based on distance between hop-vectors of the node and destination. The simulation results show that HVGF works well in the low density network or network which contains a large void in the center compared to existing greedy forwarding method using information of real geographical position.
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データセントリックセンサネットワークにおけるルーティング方式の検討
佐藤雄亮, 油田健太郎, 岡崎直宣, 冨田重幸, 朴 美娘
電子情報通信学会技術研究報告, MoMuC, 107 ( 39 ) 125 - 130 2007.5
Language：Japanese Publishing type：Research paper (other academic)
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分散DoS 攻撃追跡手法の効率化に関する検討
古賀勝寛, 岡崎直宣
電気学会研究会資料，IS 07 ( 15 ) 31 - 36 2007.4
Language：Japanese Publishing type：Research paper (other academic)
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センサネットワークにおける一方向鍵チェーンを用いたリンクベースのメッセージ認証方式の提案
玉里 梨香, 岡崎 直宣
情報処理学会火の国情報シンポジウム2007論文集 ( B-1-5 ) 1 - 8 2007.3
Language：Japanese Publishing type：Research paper (other academic)
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トラフィック監視によるネットワーク攻撃追跡方式の効率化に関する一検討
古賀 勝寛, 矢羽田 哲也, 岡崎 直宣
情報処理学会火の国情報シンポジウム2007論文集 ( B-4-3 ) 1 - 8 2007.3
Language：Japanese Publishing type：Research paper (other academic)
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センサネットワークにおけるホップ数に基づくルーティング方式の提案と評価
佐藤 雄亮, 守田 可南子, 岡崎 直宣
情報処理学会火の国情報シンポジウム2007論文集 ( B-1-3 ) 1 - 8 2007.3
Language：Japanese Publishing type：Research paper (other academic)
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TAKEO DAISUKE, ITO MASASHI, SUZUKI HIDEKAZU, OKAZAKI NAONOBU, WATANABE AKIRA
IPSJ Journal 48 ( 2 ) 644 - 655 2007.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
Attackers usually use Stepping-stone attacks in order to hide their identity. To detect these kinds of attacks, timing-based method is conventionally used that detects the correlation of the traffic between receiving packets and sending packets at the Stepping-stone. However, this method can detect only remote-login chains and it takes tens of seconds. In this paper, we focus on the fact that a Stepping-stone always begins a TCP connection after receiving command sequence from the attacker. We propose a connection-based method that detects two specific TCP packets are within a certain period of time. The two packets are, a TCP SYN packet which is transmitted from a Stepping-stone to a target, and a remote-login packet that is transmitted from an attacker to a Stepping-stone. The proposed method can detect not only remote-login chains, but all kinds of Stepping-stone attacks immediately. We implemented our proposed connection-based method in a network monitor device and confirmed that the device effectively detect the attacks.
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MIYOSAWA TADASHI, KOUI YUUJI, OKAZAKI NAONOBU, NAKAYA NAOSHI, KAMEYAMA WATARU
IPSJ Journal 48 ( 2 ) 743 - 754 2007.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
Recently broadband Internet such as ADSL and FTTH is getting popular, Many PC and home appliance becomes always connected to Internet not only in office environment but also in home environment. Remote access attracts attention as a technique for supporting such connected equipment like PC. However, when remote PC is connected to the Internet via a router which has function of Network Address Translator, remote access to such PC from the outside is difficult. We have developed the method that PC can be assisted by the remote assistant without security issues even if that PC is connected via a router. It was jointly developed and evaluated by several Universities and local companies who want to provide this kind of services such as Help Desk. In this paper, we propose remote access system, which is using "Relay Server" to relay client and assistant connection and encrypting data with SSL. In University, after several prototype implementation and experiments, "Remote Access Platform" was developed, and several local companies built their services based on this "Platform". Collaboration between academia and industry enables the practical implementation of remote access system using relay server.
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センサネットワークにおける位置情報を用いないルーティング方式の検討
守田 可南子, 佐藤 雄亮, 岡崎 直宣, 朴 美娘
情報処理学会研究報告，DBS 2007 ( 141 ) 171 - 178 2007.1
Language：Japanese Publishing type：Research paper (other academic)
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PARK MIRANG, OKAZAKI NAONOBU, BABA YOSHIMASA
IPSJ Journal 47 ( 7 ) 2058 - 2070 2006.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
Rapid deployment of wireless technology has led to rapid growth of high-speed wireless LAN (WLAN). For constructing a ubiquitous network, the high-speed WLAN attracts attention as an infrastructure for global access. However, some issues are impeding further adoption of the technology, in particular, security problems including user authentication, message compromising, connection hijacking and handoff problems of moving users. In this paper, we discuss a seamless user authentication method of mobile terminals in WLAN. To achieve a fast IP layer handoff between Access Points (APs) and mobile terminals and sharing of a session key between users, we propose a seamless pre-authentication and key distribution protocol based on cached Pre-Shared Keys and FMIPv6 messages.
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アドホックネットワークにおける階層型複数経路構築手法の評価
油田 健太郎，守田 可南子，岡崎 直宣，冨田 重幸, 朴 美娘
電子情報通信学会技術研究報告, MoMuC, 106 ( 44 ) 119 - 124 2006.5
Language：Japanese Publishing type：Research paper (other academic)
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Okazaki Naonobu, Sueyoshi Toshiaki
Memoirs of the Faculty of Engineering, Miyazaki University 34 219 - 226 2005.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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An experimental evaluation of trace-back techniques of Distributed Denial of Service attacks
Okazaki Naonobu, Yahata Tetsuya, Kawamura Shigehisa
Memoirs of the Faculty of Engineering, Miyazaki University 34 227 - 234 2005.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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無線LANシステムにおけるシームレスユーザ認証方法に関する考察 Reviewed
朴 美娘, 馬場 義昌, 岡崎 直宣
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2005）論文集 97 - 100 2005.7
Language：Japanese Publishing type：Research paper (other academic)
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アドホックネットワークにおける階層化複数経路構築手法の提案 Reviewed
油田 健太郎, 岡崎 直宣, 冨田 重幸
情報処理学会マルチメディア，分散，協調とモバイルシンポジウム（DICOMO2005）論文集 317 - 320 2005.7
Language：Japanese Publishing type：Research paper (other academic)
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モバイルアドホックネットワーク上のPeer to Peerシステムにおける情報検索手法の一検討
小林 亜衣, 蛯原 敏博, 油田 健太郎, 岡崎 直宣, 朴 美娘
情報処理学会火の国情報シンポジウム2005論文集 ( A-2-1 ) 1 - 8 2005.3
Language：Japanese Publishing type：Research paper (other academic)
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アドホックネットワークにおける階層型複数経路構築手法の検討
油田 健太郎, 本田 浩一, 岡崎 直宣, 冨田 重幸, 朴美娘
情報処理学会火の国情報シンポジウム2005論文集 ( A-2-2 ) 1 - 8 2005.3
Language：Japanese Publishing type：Research paper (other academic)
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A Zone-Based Maltipath routing for ad hoc network
ABURADA Kentaro, HONDA Koichi, OKAZAKI Naonobu, TOMITA Shigeyuki
IPSJ SIG technical reports 2004 ( 114 ) 63 - 70 2004.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
A global positioning system (GPS)-based routing protocol, called zone-based hierarchical link state (ZHLS) routing protocol, have been proposed for routing data packets for ad hoc networks. In this protocol, the network is divided into non-overlapping zones. Each node only knows the node connectivity within its zone and the zone connectivity of the whole network. The link state routing is performed on two levels : local node and global zone levels. Hierarchical approach reduces the amount of overhead of dynamic changing topology. ZHLS is, however, single-path protocol which detects only one route. In ad hoc networks, due to mobility of nodes and instability of communication links, multipath protocols are required. In this paper, we propose an eXtended ZHLS (called XZHLS) which generates disjoint paths in global zone level. If a disconnected link is detected in the currently using route, packet transmission is switched to another route.
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An experimental evaluation of trace-back techniques of Denial of Service attacks
KAWAMURA Shigehisa, OKAZAKI Naonobu
IPSJ SIG technical reports 2004 ( 114 ) 111 - 118 2004.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
Recently, frequency of Denial of Service attacks are increased, and it is difficult to trace packets with incorrect, or "spoofed", source address. Savage et al. proposed a method to trace flooding attacks by "marking" packets. This method, however, has some problems including the time consuming for gathering packets to re-configure the attacking paths. We proposed a method to solve this problem by extending marking area in each packet. In this paper, we will implement the both algorithms to estimate the usability of them. From the results of some experiments, we will conclude the effectiveness of the extended method.
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アドホックネットワークにおける階層型複数経路構築手法の提案
油田 健太郎，本田 浩一，岡崎 直宣，冨田 重幸
情報処理学会研究報告, MBL 2004 ( 114 ) 63 - 70 2004.11
Language：Japanese Publishing type：Research paper (other academic)
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ネットワークサービス不能攻撃に対する追跡手法の実装と評価
河村 栄寿，岡崎 直宣
情報処理学会研究報告, MBL 2004 ( 114 ) 111 - 118 2004.11
Language：Japanese Publishing type：Research paper (other academic)
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Examination about user management technique in the beginner PC user supprt system
Aburada Kentaro, Kanazawa Masashi, Hiratsuka Yoshihiro, Okazaki Naonobu
Memoirs of the Faculty of Engineering, Miyazaki University 33 399 - 406 2004.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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A study of a method to support the mobility of IP addresses using IP address translations
Okazaki Naonobu, Itayama Shun-ichi
Memoirs of the Faculty of Engineering, Miyazaki University 33 391 - 398 2004.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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A study of a secure communication method in peer-to-peer systems
Okazaki Naonobu, Kobayashi Ako
Memoirs of the Faculty of Engineering, Miyazaki University 33 407 - 414 2004.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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A Proposal of a construction method of a peer-to-peer network with bidirectional anonymity
Okazaki Naonobu, Takimoto Yusuke
Memoirs of the Faculty of Engineering, Miyazaki University 33 415 - 422 2004.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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A multicast routing algorithm suppressing branches
Okazaki Naonobu, Kudo Masao
Memoirs of the Faculty of Engineering, Miyazaki University 32 373 - 379 2003.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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Security issues of the beginner PC user support system using remote access
Okazaki Naonobu, Aburada Kentaro
Memoirs of the Faculty of Engineering, Miyazaki University 32 365 - 371 2003.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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Proposal of a data transfer protocol suitable for multimedia communications on shared-media LAN
Yabe M., Ideguchi T., Fujii T., Koui Y., Baba Y., Okazaki N.
5th Asia-Pacific Conference Communications and 4th Optoloelectronics Communications Conference: The Conference-Vitality to New Century, APCC/OECC 1999 1 246 - 249 1998
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：5th Asia-Pacific Conference Communications and 4th Optoloelectronics Communications Conference: The Conference-Vitality to New Century, APCC/OECC 1999
© 1999 China Inst. Of Communications. For the realization of multimedia communications or time critical communications over shared-media LANs, not only high transmission rate but also data transmission within a specified time is required. In this paper, in order to realize a real time data transmission, we propose a new data transfer protocol that is modified from TTP and guarantees the QoS of synchronous data of FDDI even when the excess synchronous data occur instantaneously. Further, we evaluate its effectiveness by simulations and make clear the communication services to be applied.