Papers - KATAYAMA Tetsuro
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Basic Studies for Realizing User Authentication Method Using Surface Electromyogram Signals
IPSJ SIG Notes 2015 ( 32 ) 1 - 6 2015.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)
At the present time, mobile devices such as tablet-type PCs and smart phones have widely penetrated into our daily lives. Therefore, an authentication method that prevents shoulder surfing is needed. We are investigating a new user authentication method for mobile devices that uses surface electromyogram (s-EMG) signals, not screen touching. The s-EMG signals, which are generated by the electrical activity of muscle fibers during contraction, are detected over the skin surface. Muscle movement can be differentiated by analyzing the s-EMG. In this paper, a series of experiments was carried out to investigate the prospect of an authentication method using s-EMGs. Specifically, several gestures of the wrist were introduced, and the s-EMGs generated for each motion pattern were measured. We compared the s-EMG patterns generated by each subject with the patterns generated by other subjects. As a result, it was found that each subject has similar patterns that are different from those of other subjects. Thus, s-EMGs can be used to confirm one' s identification for authenticating passwords on touchscreen devices.
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An Authentication Method Independent of Tap Operation on the Touchscreen of a Mobile Device Reviewed
H. Yamaba, S. Nagatomo, K. Aburada, S. Kubota, T. Katayama, M. Park, and N. Okazaki
Journal of Robotics, Networking and Artificial Life (JRNAL) 2 ( 1 ) 60 - 63 2015.4
Language：English Publishing type：Research paper (scientific journal)
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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
Journal of Robotics, Networking and Artificial Life (JRNAL) 2 ( 1 ) 9 - 12 2015.4
Language：English Publishing type：Research paper (scientific journal)
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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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文字認識攻撃に耐性を持つランダム妨害図形を用いた画像ベース CAPTCHA方式の提案
田村拓己, 久保田真一郎, 油田健太郎, 片山徹郎, 朴美娘, 岡崎直宣
情報処理学会論文誌 56 ( 3 ) 808 - 818 2015.3
Language：Japanese 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, S. Kitano, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Journal of Robotics, Networking and Artificial Life (JRNAL) 1 ( 4 ) 299 - 302 2015.3
Language：English Publishing type：Research paper (scientific journal)
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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. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 388 - 391 2015.1
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
Y. Kikkawa, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 384 - 387 2015.1
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
S. Kitano, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 380 - 383 2015.1
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
H. Nakamura, T. Katayama, Y. Kita, H. Yamaba, K. Aburada, and N. Okazaki
Proc. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 376 - 379 2015.1
Language：English Publishing type：Research paper (scientific journal)
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Code Coverage Visualization on Web-Based Testing Tool for Java Programs Reviewed
M. Chandra Saputra and T. Katayama
Proc. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 372 - 375 2015.1
Language：English Publishing type：Research paper (scientific journal)
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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. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 368 - 371 2015.1
Language：English Publishing type：Research paper (scientific journal)
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Evaluation of Neighbors Based Routing for ad hoc networks Reviewed
K. Aburada, H. Yamaba, S. Kubota, T. Katayama, M. Park, and N. Okazaki
Proc. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 335 - 339 2015.1
Language：English Publishing type：Research paper (scientific journal)
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An Authentication Method for Mobile Devices that is Independent of Tap-Operation on a Touchscreen Reviewed
H. Yamaba, S. Nagatomo, K. Aburada, S. Kubota, T. Katayama, M. Park, and N. Okazaki
Proc. 2015 Int'l Conf. on Artificial Life and Robotics (ICAROB 2015) 327 - 330 2015.1
Language：English Publishing type：Research paper (scientific journal)
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Countermeasure against fingerprinting attack in Tor by separated contents retrieval
Okazaki Naonobu, Toyoda Kentaroh, Yokoyama Emiri, So Hirofumi, Katayama Tetsuro, Park Mirang
IEICE Communications Express 4 ( 12 ) 370 - 375 2015
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers
Tor (The Onion Router) realizes that anonymous web surfing without revealing the user's identity. However, A. Panachenko et al. reveals that an onion router that directly communicates with a user can infer which website a user accesses by leveraging site-specific traffic features, e.g., volume and time, and this attack is called the fingerprinting attack. In this paper, we propose a countermeasure against the fingerprinting attack by obfuscating site-specific traffic features. The idea is to establish two distinct Tor connections and to separately request text-based contents and image-based one through them. We show the effectiveness of our scheme with experiments.
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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, Networking and Artificial Life (JRNAL) 1 ( 3 ) 207 - 211 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, Networking and Artificial Life (JRNAL) 1 ( 3 ) 174 - 178 2014.12
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
T. Katayama, Z. Zhao, Y. Kita, H. Yamaba, and N. Okazaki
Journal of Robotics, Networking and Artificial Life (JRNAL) 1 ( 2 ) 120 - 124 2014.9
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
T. Katayama, H. Nakamura, Y. Kita, H. Yamaba, and N. Okazaki
Journal of Robotics, Networking and Artificial Life (JRNAL) 1 ( 2 ) 111 - 115 2014.9
Language：English Publishing type：Research paper (scientific journal)
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Javaプログラム実行時のデータ遷移可視化によるデバッグ支援 Reviewed
中村紘人, 片山徹郎, 喜多義弘, 山場久昭, 岡崎直宣
情報処理学会 ソフトウェアエンジニアリングシンポジウム2014(SES2014) 125 - 130 2014.9
Language：Japanese Publishing type：Research paper (scientific journal)