Tetsushi Ohki

Most-cited papers

Cancelable Permutation-Based Indexing for Secure and Efficient Biometric Identification
Takao Murakami, Ryo Fujita, Tetsushi Ohki, Yosuke Kaga +2 more
2019IEEE Access38 citations Open access
Semantic Scholar
Optimal sequential fusion for multibiometric cryptosystems
Takao Murakami, Tetsushi Ohki, Kenta Takahashi
2016Information Fusion25 citations
Semantic Scholar
A Secure and Practical Signature Scheme for Blockchain Based on Biometrics
Yosuke Kaga, Masakazu Fujio, Ken Naganuma, Kenta Takahashi +3 more
2017Information Security Practice and Experience24 citations
Semantic Scholar
Face/Fingerphoto Spoof Detection under Noisy Conditions by using Deep Convolutional Neural Network
Masakazu Fujio, Yosuke Kaga, Takao Murakami, Tetsushi Ohki +1 more
2018International Conference on Bio-inspired Systems and Signal Processing14 citations Open access
Semantic Scholar
Ransomware Detection Considering User's Document Editing
Toshiki Honda, Kohei Mukaiyama, Takeharu Shirai, Tetsushi Ohki +1 more
2018International Conference on Advanced Information Networking and Applications14 citations Open access
Semantic Scholar
Evaluation of security for biometric guessing attacks in biometric cryptosystem using fuzzy commitment scheme
Seira Hidano, Tetsushi Ohki, Kenta Takahashi
2012Biometrics and Electronic Signatures14 citations
Semantic Scholar
Cancelable Indexing Based on Low-rank Approximation of Correlation-invariant Random Filtering for Fast and Secure Biometric Identification
Takao Murakami, Tetsushi Ohki, Yosuke Kaga, Masakazu Fujio +1 more
2018Pattern Recognition Letters13 citations Open access
Semantic Scholar
PinchKey: A Natural and User-Friendly Approach to VR User Authentication
Mei Suzuki, Ryo Iijima, Kazuki Nomoto, Tetsushi Ohki +1 more
2023European Symposium on Usable Security11 citations Open access
Semantic Scholar
Improved Post-quantum-secure Face Template Protection System Based on Packed Homomorphic Encryption
Hiroto Tamiya, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana +1 more
2021Biometrics and Electronic Signatures10 citations
Semantic Scholar
On biometric encryption using fingerprint and it's security evaluation
Seira Hidano, Tetsushi Ohki, N. Komatsu, M. Kasahara
2008International Conference on Control, Automation, Robotics and Vision10 citations
Semantic Scholar
Model-Free Template Reconstruction Attack with Feature Converter
M. Akasaka, S. Maeda, Y. Sato, Masakatsu Nishigaki +1 more
2022Biometrics and Electronic Signatures8 citations Open access
Semantic Scholar
Security performance evaluation for biometric template protection techniques
Y. Isobe, Tetsushi Ohki, N. Komatsu
2013International Journal of Biometrics (IJBM)7 citations
Semantic Scholar
Leveraging Intermediate Features of Vision Transformer for Face Anti-Spoofing
Mika Feng, Koichi Ito, T. Aoki, Tetsushi Ohki +1 more
20252025 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)6 citations Open access
Semantic Scholar
Evaluation of wolf attack for classified target on speaker verification systems
Tetsushi Ohki, Seira Hidano, T. Takehisa
2012International Conference on Control, Automation, Robotics and Vision6 citations
Semantic Scholar
A metric of identification performance of biometrics based on information content
Seira Hidano, Tetsushi Ohki, N. Komatsu, Kenta Takahashl
2010International Conference on Control, Automation, Robotics and Vision6 citations
Semantic Scholar
LabellessFace: Fair Metric Learning for Face Recognition without Attribute Labels
Tetsushi Ohki, Y. Sato, Masakatsu Nishigaki, Koichi Ito
20242024 IEEE International Joint Conference on Biometrics (IJCB)5 citations
Semantic Scholar
Efficient Spoofing Attack Detection against Unknown Sample using End-to-End Anomaly Detection
Tetsushi Ohki, Vishu Gupta, Masakatsu Nishigaki
2019Asia-Pacific Signal and Information Processing Association Annual Summit and Conference5 citations
Semantic Scholar
A consideration on a common template-based biometric cryptosystem using on-line signatures
Yuuki Goubaru, Y. Yamazaki, Takeru Miyazaki, Tetsushi Ohki
2014Global Conference on Consumer Electronics5 citations
Semantic Scholar
ExpressionAuth: Utilizing Avatar Expression Blendshapes for Behavioral Biometrics in VR
Tussoun Jitpanyoyos, Y. Sato, S. Maeda, Masakatsu Nishigaki +1 more
20242024 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW)4 citations
Semantic Scholar
Improving Robustness and Visibility of Adversarial CAPTCHA Using Low-Frequency Perturbation
Takamichi Terada, Vo Ngoc Khoi Nguyen, Masakatsu Nishigaki, Tetsushi Ohki
2022International Conference on Advanced Information Networking and Applications4 citations Open access
Semantic Scholar
Improving Classification Accuracy by Optimizing Activation Function for Convolutional Neural Network on Homomorphic Encryption
K. Yagyu, Ren Takeuchi, Masakatsu Nishigaki, Tetsushi Ohki
2022Broadband and Wireless Computing, Communication and Applications4 citations Open access
Semantic Scholar
Unsupervised Biometric Anti-spooﬁng using Generative Adversarial Networks
Vishu Gupta, Masakatsu Nishigaki, Tetsushi Ohki
20194 citations
Semantic Scholar
The Catcher in the Eye: Recognizing Users by their Blinks
Ryo Iijima, T. Takehisa, Tetsushi Ohki, Tatsuya Mori
2024ACM Asia Conference on Computer and Communications Security3 citations
Semantic Scholar
DiReCT: Disaster Response Coordination with Trusted Volunteers
Mohammad Jahanian, T. Hasegawa, Yoshinobu Kawabe, Yuki Koizumi +4 more
2019International Conference on Information and Communication Technologies for Disaster Management3 citations
Semantic Scholar
Toward More Secure and Convenient User Authentication in Smart Device Era
Y. Yamazaki, Tetsushi Ohki
2017IEICE Trans. Inf. Syst.3 citations Open access
Semantic Scholar
Security evaluation of a finger vein authentication algorithm against wolf attack
Akira Otsuka, Tetsushi Ohki, R. Morita, Manabu Inuma +1 more
20163 citations
Semantic Scholar
Theoretical vulnerability in likelihood-ratio-based biometric verification
Tetsushi Ohki, Akira Otsuka
2014IEEE International Joint Conference on Biometrics3 citations
Semantic Scholar
Safety of templates in biometric person authentication using error-correcting code
Tetsushi Ohki, S. Akatsuka, N. Komatsu, M. Kasahara
2006Electronic imaging3 citations
Semantic Scholar
Synthesizing differentially private location traces including co-locations
Jun Narita, Takao Murakami, H. Hino, Masakatsu Nishigaki +1 more
2023International Journal of Information Security2 citations Open access
Semantic Scholar
A Liveness Detection Method for Palmprint Authentication
Ayaka Sugimoto, Yuya Shiomi, Akira Baba, Norihiro Okui +3 more
2020International Conference on Intelligent Human Systems Integration2 citations
Semantic Scholar
Theoretical vulnerabilities in map speaker adaptation
Tetsushi Ohki, Akira Otsuka
2017IEEE International Conference on Acoustics, Speech, and Signal Processing2 citations
Semantic Scholar
A Study on Autoencoder-based Reconstruction Method for Wi-Fi Location Data with Erasures
Tetsushi Ohki, Akira Otsuka
2017MPS@CCS2 citations
Semantic Scholar
A Study on Construction and Security of Computer-Aided Security Schemes
Yasuyoshi Jinno, Takashi Tsuchiya, Tetsushi Ohki, Kenta Takahashi +2 more
20172017 International Conference on Computational Science and Computational Intelligence (CSCI)2 citations Open access
Semantic Scholar
Can We End the Cat-and-Mouse Game? Simulating Self-Evolving Phishing Attacks with LLMs and Genetic Algorithms
Seiji Sato, Tetsushi Ohki, Masakatsu Nishigaki
2025arXiv.org1 citations
Semantic Scholar
Social Engineering Attack Targeting Vulnerabilities in 1-to-N Avatar Operation Switching: A Positioning Study
I. Matsuda, Sena Enomoto, Tsubasa Shibata, Fan Yang +3 more
2025Broadband and Wireless Computing, Communication and Applications1 citations
Semantic Scholar
Study of Appropriate Information Combination in Image-based Obfuscated Malware Detection
Tetsuro Takahashi, Rikima Mitsuhashi, Masakatsu Nishigaki, Tetsushi Ohki
20252025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks - Supplemental Volume (DSN-S)1 citations
Semantic Scholar
Electrical Muscle Stimulation System for Automatic Reproduction of Secret Information Without Exposing Biometric Data
Takumi Takaiwa, Shinnosuke Nozaki, Kota Numada, Tsubasa Shibata +4 more
2024Interacción1 citations
Semantic Scholar
MagSerea: Fingerprinting Magnetic Field of Specified Area with Wearable Sensors
Tomoya Aiba, Takahiko Arakawa, Masakatsu Nishigaki, Tatsuya Mori +1 more
2024International Conference on Human-Computer Interaction with Mobile Devices and Services1 citations
Semantic Scholar
Are Dark Patterns Self-destructive for Service Providers?: Revealing Their Impacts on Usability and User Satisfaction
T. Kojima, Tomoya Aiba, S. Maeda, Hiromi Arai +2 more
2024Interacción1 citations
Semantic Scholar
Ensemble Malware Classifier Considering PE Section Information
Ren Takeuchi, Rikima Mitsuhashi, Masakatsu Nishigaki, Tetsushi Ohki
2024IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences1 citations
Semantic Scholar
Scheme for Selection of Deceptions as a Countermeasure for Insider Threats
Sana Okumura, Tomoya Amagasa, Tsubasa Shibata, Takumi Yamamoto +3 more
2023Broadband and Wireless Computing, Communication and Applications1 citations
Semantic Scholar
A Fair Model is not Fair in a Biased Environment
Y. Sato, S. Maeda, M. Akasaka, Masakatsu Nishigaki +1 more
2022Asia-Pacific Signal and Information Processing Association Annual Summit and Conference1 citations
Semantic Scholar
Privacy-aware Snippets: Enhancing Assessment of Balance between Privacy Risks and Benefits in Web Search
Yusuke Shimizu, Tetsushi Ohki, Yusuke Yamamoto
2022Conference on Information Technology for Social Good1 citations
Semantic Scholar
Synthesizing Privacy-Preserving Location Traces Including Co-locations
Jun Narita, Yayoi Suganuma, Masakatsu Nishigaki, Takao Murakami +1 more
2021DPM/CBT@ESORICS1 citations Open access
Semantic Scholar
Understanding the Impact of Service Trials on Privacy Disclosure
Yayoi Suganuma, Jun Narita, Masakatsu Nishigaki, Tetsushi Ohki
2020Interacción1 citations Open access
Semantic Scholar
PDH : Probabilistic Deep Hashing Based on Map Estimation of Hamming Distance
Yosuke Kaga, Masakazu Fujio, Kenta Takahashi, Tetsushi Ohki +1 more
2019International Conference on Information Photonics1 citations Open access
Semantic Scholar
Micro Disposable Biometric Authentication: An Application Using Fingernail Minute Textures for Nonsensitive Services
Genki Sugimoto, Masahiro Fujita, Yuto Mano, Tetsushi Ohki +1 more
2018International Conference on Biomedical Imaging, Signal Processing1 citations
Semantic Scholar
Automatic Examination-Based Whitelist Generation for XSS Attack Detection
Keisuke Inoue, Toshiki Honda, Kohei Mukaiyama, Tetsushi Ohki +1 more
2018Broadband and Wireless Computing, Communication and Applications1 citations Open access
Semantic Scholar
INVITED PAPER Special Section on Advanced Log Processing and Office Information Systems Toward More Secure and Convenient User Authentication in Smart Device Era
Y. Yamazaki, Tetsushi Ohki
20171 citations
Semantic Scholar
Optimal Sequential Fusion for Multibiometric
Takao Murakami, Tetsushi Ohki, Kenta Takahashi
20161 citations
Semantic Scholar