論文 - 山場 久昭
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Application of Pairwise Testing to Test Cases by Boundary Value Analysis in BWDM
Futa Hirakoba, Tetsuro Katayama, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Proc. 2019 Int’l Conf. on Artificial Life and Robotics (ICAROB 2019) 161 - 164 2019年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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HMD-based Cover Test System for the Diagnosis of Ocular Malalignment 査読あり
Noriyuki Uchida, Kayoko Takatuka, Atsusi Nakazawa, Masayuki Mukunoki, Hisaaki Yamaba, Naonobu Okazaki
Journal of Artificial Life and Robotics, Springer 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Implementation of Arduino Simulator ADVIS Visualizing the Value of Voltage on the Circuit 査読あり
Tetsuro Katayama, Tatsumi Nishida, Yoshihiro Kita, Hisaaki Yamaba, Kentaro Aburada, Naonobu Okazaki
Journal of Robotics, Networks and Artificial Life 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Use of access characteristics to distinguish legitimate user traffic from DDoS attack traffic
Aburada K., Arikawa Y., Usuzaki S., Yamaba H., Katayama T., Park M., Okazaki N.
Artificial Life and Robotics 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：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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Investigation on sharing signatures of suspected malware files using blockchain technology 査読あり
Fuji R., Usuzaki S., Aburada K., Yamaba H., Katayama T., Park M., Shiratori N., Okazaki N.
Lecture Notes in Engineering and Computer Science 2239 94 - 99 2019年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Lecture Notes in Engineering and Computer Science
© 2019 Turkiye Klinikleri Journal of Medical Sciences. All rights reserved. In recent years, the amount of new malware has been rapidly increasing. Because malware has an adverse effect on the Internet, upon which modern society is increasingly dependent, its detection is very important. In addition, blockchain technology has attracted the attention of many people in recent years due to its four main characteristics of decentralization, persistency, anonymity, and auditability. In this paper, we propose a system for sharing the signatures of suspected malware files using blockchain technology. The proposed system can share the signatures of suspected files between users, allowing them to rapidly respond to increasing malware threats. Further, it improves the accuracy of detection and removal of malware by utilizing signatures recorded by the blockchain. In the evaluation experiment, we created a prototype of the proposed system and investigated its effect on the accuracy of detection and removal of malware. Compared with heuristic methods or behavior-based methods only, the proposed system which uses these methods plus signature-based method using shared signatures on the blockchain improved the false negative rate by about 4% and the false positive rate by about 2.5%.
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CHAMSIN: CaptcHA by caMouflaged StrINg 査読あり
Mukunoki Masayuki, Yamaba Hisaaki, Usuzaki Shotaro, Aburada Kentaro, Katayama Tetsuro, Park Mirang, Okazaki Naonobu
IEICE Communications Express 8 ( 3 ) 55 - 60 2019年
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：一般社団法人 電子情報通信学会
We propose a new CAPTCHA scheme that uses random dot patterns (RDPs) to prevent highly-developed bots attacks. Human beings can recognize a moving figure filled by a RDP from a background that is filled by another RDP; however, it is impossible to find such figures when they are stationary. Since image recognition by bots is usually carried out frame by frame, it is hard for bots to recognize such moving figures. The proposed CAPTCHA scheme exploits this characteristic. Several experiments were carried out to confirm that the proposed CAPTCHA scheme is usable enough and has enough resistance against bot attacks.
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A Proposal of New Reading Text CAPTCHA using Random Dot Patterns 査読あり
Yamaba H., Usuzaki S., Aburada K., Mukunoki M., Park M., Okazaki N.
Proceedings - 2018 6th International Symposium on Computing and Networking, CANDAR 2018 207 - 212 2018年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings - 2018 6th International Symposium on Computing and Networking, CANDAR 2018
© 2018 IEEE. According to the growth of troubles caused by malicious programs called bots, CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) comes to be an important role in the current information society. CAPTCHA identifies bots from legitimate human users by requiring some questions that are easy for humans to solve but difficult for bots. However, the progress of computing technology such as Optical Character Recognition (OCR) function. bots come to be able to solve present CAPTCHAs. In order to outcome such troublesome bots, more sophisticated CAPTCHA that requires the high cognitive ability of human beings is desired. In this paper, we propose a new CAPTCHA scheme that uses random dot patterns. Human beings can recognize a moving figure filled by a random dot pattern from a background that is filled by another random dot pattern; however, they lose the figure in the background when the figure pauses. Since image recognition by computer programs is usually carried out frame by frame, it is hard for bots to recognize such a moving figure filled by a random dot pattern from another random dot pattern background. The proposed CAPTCHA scheme exploits this characteristic of random dot patterns. This CAPTCHA requires users to answer a text filled by a random dot pattern that is moving on a background also filled by another random dot pattern. Several experiments were carried out to confirm that the proposed CAPTCHA scheme has enough resistance against bot attacks using representative image recognition methods. Results of the experiments showed that the image recognition methods cannot find out the answer text. Other experiments were also carried out to evaluate the usability of the proposed CAPTCHA scheme. The system usability scheme was adopted in the experiments. The obtained score was 89 that means this CAPTCHA scheme has high usability. These results showed that the CAPTCHA scheme is usable enough and has enough resistance against bot attacks.
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Evaluation of User Identification Methods for Realizing an Authentication System Using s-EMG
Hisaaki Yamaba, Kentaro Aburada, Tetsuro Katayama, Mirang Park, and Naonobu Okazaki
Ad- vances in Network-Based Information Systems, Lecture Notes on Data Engineering and Communications Technologies 732 - 742 2018年9月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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表面筋電位を用いた認証システム実装のための筋電波形の特徴量の選出
平田 木乃美, 横山 美波, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 315 - 319 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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ユーザの視線経路を用いた PIN 入力手法の提案
平田 木乃美, 山口 翔太, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 311 - 314 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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眼位異常スクリーニングのための定性的な眼位検査システムの開発
平田 木乃美, 日隈 光基, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 305 - 309 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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眼位異常のスクリーニングのための定性的な眼位検査システムに関する研究
平田 木乃美, 日隈 光基, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 291 - 303 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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口蹄疫の防疫判断をサポートするシステムの開発
平田 木乃美, 岩満 海人, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 285 - 289 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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モバイルデバイスの利用に適した CAPTCHA 方式の検討
富田 旋, 初 蕾, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 279 - 283 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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リレーアタック耐性と BOT 耐性の両立を目指したインタラクティブな動画 CAPTCHA 方式に関する研究
富田 旋, 立田 怜平, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 255 - 277 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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時間とコストの一元管理のためのプロジェクト管理システムの大規模プロジェクトへの適用に関する検討
富田 旋, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 249 - 253 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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画像認識では識別困難な指文字の筋電位による識別の検討
富田 旋, 黒木 誠, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 243 - 247 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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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について
富田 旋, 門川 真樹, 高塚 佳代子, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 237 - 241 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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表面筋電位を用いた認証システム実現のための個人識別手法の提案
黒木 聡舜, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 227 - 236 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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リアルタイムバースト検出手法による即応性を考慮した DDoS 攻撃検知手法
臼崎 翔太郎, 山場 久昭, 油田 健太郎, 岡崎 直宣
宮崎大学工学部紀要 ( 47 ) 221 - 225 2018年7月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）