Tetsushi Ohki

According to our database, Tetsushi Ohki authored at least 58 papers between 2006 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2024

Synthesizing differentially private location traces including co-locations.

Jun Narita, Takao Murakami, Hideitsu Hino, Masakatsu Nishigaki, Tetsushi Ohki

Int. J. Inf. Sec., February, 2024

Ensemble Malware Classifier Considering PE Section Information.

Ren Takeuchi, Rikima Mitsuhashi, Masakatsu Nishigaki, Tetsushi Ohki

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024

Multibiometrics Using a Single Face Image.

Koichi Ito, Taito Tonosaki, Takafumi Aoki, Tetsushi Ohki, Masakatsu Nishigaki

CoRR, 2024

A Human-Centered Risk Evaluation of Biometric Systems Using Conjoint Analysis.

Tetsushi Ohki, Narishige Abe, Hidetsugu Uchida, Shigefumi Yamada

CoRR, 2024

LabellessFace: Fair Metric Learning for Face Recognition without Attribute Labels.

Tetsushi Ohki, Yuya Sato, Masakatsu Nishigaki, Koichi Ito

CoRR, 2024

ExpressionAuth: Utilizing Avatar Expression Blendshapes for Behavioral Biometrics in VR.

Tussoun Jitpanyoyos, Yuya Sato, Soshi Maeda, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops, 2024

DAP PLXENT#x1D107; : Develop pair-Authentication Protocol with DAP.

Soshi Maeda, Masora Okano, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the Adjunct Proceedings of the 26th International Conference on Mobile Human-Computer Interaction, 2024

MagSerea: Fingerprinting Magnetic Field of Specified Area with Wearable Sensors.

Tomoya Aiba, Takahiko Arakawa, Masakatsu Nishigaki, Tatsuya Mori, Tetsushi Ohki

Proceedings of the Adjunct Proceedings of the 26th International Conference on Mobile Human-Computer Interaction, 2024

Electrical Muscle Stimulation System for Automatic Reproduction of Secret Information Without Exposing Biometric Data.

Takumi Takaiwa, Shinnosuke Nozaki, Kota Numada, Tsubasa Shibata, Sana Okumura, Soichi Takigawa, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the HCI for Cybersecurity, Privacy and Trust, 2024

Are Dark Patterns Self-destructive for Service Providers?: Revealing Their Impacts on Usability and User Satisfaction.

Toi Kojima, Tomoya Aiba, Soshi Maeda, Hiromi Arai, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the HCI in Business, Government and Organizations, 2024

Perceiving Human Psychological Consistency: Attack Detection Against Advanced Persistent Social Engineering.

Kota Numada, Shinnosuke Nozaki, Takumi Takaiwa, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advances in Internet, Data & Web Technologies, 2024

The Catcher in the Eye: Recognizing Users by their Blinks.

Ryo Iijima, Tatsuya Takehisa, Tetsushi Ohki, Tatsuya Mori

Proceedings of the 19th ACM Asia Conference on Computer and Communications Security, 2024

2023

The Unconstrained Ear Recognition Challenge 2023: Maximizing Performance and Minimizing Bias.

Ziga Emersic, Tetsushi Ohki, Muku Akasaka, Takahiko Arakawa, Soshi Maeda, Masora Okano, Yuya Sato, Anjith George, Sébastien Marcel, Iyyakutti Iyappan Ganapathi, Syed Sadaf Ali, Sajid Javed, Naoufel Werghi, S. G. Isik, Erdi Saritas, Hazim Kemal Ekenel, V. Hudovernik, Jan Niklas Kolf, Fadi Boutros, Naser Damer, G. Sharma, Aman Kamboj, Aditya Nigam, Deepak Kumar Jain, G. Cámara-Chávez, Peter Peer, Vitomir Struc

Proceedings of the IEEE International Joint Conference on Biometrics, 2023

PinchKey: A Natural and User-Friendly Approach to VR User Authentication.

Mei Suzuki, Ryo Iijima, Kazuki Nomoto, Tetsushi Ohki, Tatsuya Mori

Proceedings of the 2023 European Symposium on Usable Security, 2023

Scheme for Selection of Deceptions as a Countermeasure for Insider Threats.

Sana Okumura, Tomoya Amagasa, Tsubasa Shibata, Takumi Yamamoto, Tadakazu Yamanaka, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advances on Broad-Band and Wireless Computing, Communication and Applications, 2023

Development of a Robust Ear Recognition Algorithm using Planar Approximation.

Takahiko Arakawa, Yuya Sato, Hitoshi Sakano, Tetsushi Ohki

Proceedings of the Asia Pacific Signal and Information Processing Association Annual Summit and Conference, 2023

2022

Multi-observed Multi-factor Authentication: A Multi-factor Authentication Using Single Credential.

Shinnosuke Nozaki, Ayumi Serizawa, Mizuho Yoshihira, Masahiro Fujita, Yoichi Shibata, Tadakazu Yamanaka, Nori Matsuda, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advances in Network-Based Information Systems, 2022

Improving Rank-N Identification Rate of Palmprint Identification Using Permutation-Based Indexing.

Mizuho Yoshihira, Ayumi Serizawa, Ryosuke Okudera, Yumo Ouchi, Yuya Shiomi, Naoya Nitta, Masataka Nakahara, Akira Baba, Yutaka Miyake, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the HCI for Cybersecurity, Privacy and Trust, 2022

Privacy-aware Snippets: Enhancing Assessment of Balance between Privacy Risks and Benefits in Web Search.

Yusuke Shimizu, Tetsushi Ohki, Yusuke Yamamoto

Proceedings of the GoodIT 2022: ACM International Conference on Information Technology for Social Good, Limassol, Cyprus, September 7, 2022

Improving Classification Accuracy by Optimizing Activation Function for Convolutional Neural Network on Homomorphic Encryption.

Kohei Yagyu, Ren Takeuchi, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the Advances on Broad-Band Wireless Computing, Communication and Applications, 2022

Improving Palmprint-Region Estimation for ID-Less Palmprint Recognition.

Ayumi Serizawa, Ryosuke Okudera, Yumo Ouchi, Mizuho Yoshihira, Yuya Shiomi, Naoya Nitta, Masataka Nakahara, Akira Baba, Yutaka Miyake, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advances on Broad-Band Wireless Computing, Communication and Applications, 2022

Model-Free Template Reconstruction Attack with Feature Converter.

Muku Akasaka, Soshi Maeda, Yuya Sato, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the 21st International Conference of the Biometrics Special Interest Group, 2022

Improving Robustness and Visibility of Adversarial CAPTCHA Using Low-Frequency Perturbation.

Takamichi Terada, Vo Ngoc Khoi Nguyen, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the Advanced Information Networking and Applications, 2022

2021

Deterrence-Based Trust: A Study on Improving the Credibility of Social Media Messages in Disaster Using Registered Volunteers.

Takumi Kitagawa, Tetsushi Ohki, Yuki Koizumi, Yoshinobu Kawabe, Toru Hasegawa, Masakatsu Nishigaki

Proceedings of the Advances in Networked-Based Information Systems, 2021

Synthesizing Privacy-Preserving Location Traces Including Co-locations.

Jun Narita, Yayoi Suganuma, Masakatsu Nishigaki, Takao Murakami, Tetsushi Ohki

Proceedings of the Data Privacy Management, Cryptocurrencies and Blockchain Technology, 2021

Improved Post-quantum-secure Face Template Protection System Based on Packed Homomorphic Encryption.

Hiroto Tamiya, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana, Tetsushi Ohki

Proceedings of the 20th International Conference of the Biometrics Special Interest Group, 2021

Examining of Shallow Autoencoder on Black-box Attack against Face Recognition.

Vo Ngoc Khoi Nguyen, Takamichi Terada, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2021

2020

A Liveness Detection Method for Palmprint Authentication.

Ayaka Sugimoto, Yuya Shiomi, Akira Baba, Norihiro Okui, Tetsushi Ohki, Yutaka Miyake, Masakatsu Nishigaki

Proceedings of the Intelligent Human Systems Integration 2020, 2020

Communication Protocol Between Humans and Bank Server Secure Against Man-in-the-Browser Attacks.

Koki Mukaihira, Yasuyoshi Jinno, Takashi Tsuchiya, Tetsushi Ohki, Kenta Takahashi, Wakaha Ogata, Masakatsu Nishigaki

Proceedings of the Intelligent Human Systems Integration 2020, 2020

Understanding the Impact of Service Trials on Privacy Disclosure.

Yayoi Suganuma, Jun Narita, Masakatsu Nishigaki, Tetsushi Ohki

Proceedings of the HCI International 2020 - Posters - 22nd International Conference, 2020

Study on Possibility of Estimating Smartphone Inputs from Tap Sounds.

Yumo Ouchi, Ryosuke Okudera, Yuya Shiomi, Kota Uehara, Ayaka Sugimoto, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2020

Micro Biometric Authentication Using Fingernail Surfaces: A Study of Practical Use.

Yuya Shiomi, Genki Sugimoto, Ayaka Sugimoto, Kota Uehara, Masahiro Fujita, Yuto Mano, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advanced Information Networking and Applications, 2020

2019

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, Kenta Takahashi

Pattern Recognit. Lett., 2019

Cancelable Permutation-Based Indexing for Secure and Efficient Biometric Identification.

Takao Murakami, Ryo Fujita, Tetsushi Ohki, Yosuke Kaga, Masakazu Fujio, Kenta Takahashi

IEEE Access, 2019

On Trust Confusional, Trust Ignorant, and Trust Transitions.

Yoshinobu Kawabe, Yuki Koizumi, Tetsushi Ohki, Masakatsu Nishigaki, Toru Hasegawa, Tetsuhisa Oda

Proceedings of the Trust Management XIII - 13th IFIP WG 11.11 International Conference, 2019

DiReCT: Disaster Response Coordination with Trusted Volunteers.

Mohammad Jahanian, Toru Hasegawa, Yoshinobu Kawabe, Yuki Koizumi, Amr Magdy, Masakatsu Nishigaki, Tetsushi Ohki, K. K. Ramakrishnan

Proceedings of the 5th International Conference on Information and Communication Technologies for Disaster Management, 2019

PDH : Probabilistic Deep Hashing Based on Map Estimation of Hamming Distance.

Yosuke Kaga, Masakazu Fujio, Kenta Takahashi, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the 2019 IEEE International Conference on Image Processing, 2019

Efficient Spoofing Attack Detection against Unknown Sample using End-to-End Anomaly Detection.

Tetsushi Ohki, Vishu Gupta, Masakatsu Nishigaki

Proceedings of the 2019 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2019

2018

A Study on Human Reflex-Based Biometric Authentication Using Eye-Head Coordination.

Yosuke Takahashi, Masashi Endo, Hiroaki Matsuno, Hiroaki Muramatsu, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advances in Network-Based Information Systems, 2018

Micro Disposable Biometric Authentication: An Application Using Fingernail Minute Textures for Nonsensitive Services.

Genki Sugimoto, Masahiro Fujita, Yuto Mano, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the 2018 3rd International Conference on Biomedical Imaging, 2018

Automatic Examination-Based Whitelist Generation for XSS Attack Detection.

Keisuke Inoue, Toshiki Honda, Kohei Mukaiyama, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Advances on Broadband and Wireless Computing, 2018

Face/Fingerphoto Spoof Detection under Noisy Conditions by using Deep Convolutional Neural Network.

Masakazu Fujio, Yosuke Kaga, Takao Murakami, Tetsushi Ohki, Kenta Takahashi

Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018), 2018

Biometric Bit String Generation for Smart-Phones Using Voice Data.

Aki Harada, Yasushi Yamazaki, Tetsushi Ohki

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Ransomware Detection Considering User's Document Editing.

Toshiki Honda, Kohei Mukaiyama, Takeharu Shirai, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the 32nd IEEE International Conference on Advanced Information Networking and Applications, 2018

2017

Toward More Secure and Convenient User Authentication in Smart Device Era.

Yasushi Yamazaki, Tetsushi Ohki

IEICE Trans. Inf. Syst., 2017

A Secure and Practical Signature Scheme for Blockchain Based on Biometrics.

Yosuke Kaga, Masakazu Fujio, Ken Naganuma, Kenta Takahashi, Takao Murakami, Tetsushi Ohki, Masakatsu Nishigaki

Proceedings of the Information Security Practice and Experience, 2017

Theoretical vulnerabilities in map speaker adaptation.

Tetsushi Ohki, Akira Otsuka

Proceedings of the 2017 IEEE International Conference on Acoustics, 2017

A Study on Autoencoder-based Reconstruction Method for Wi-Fi Location Data with Erasures.

Tetsushi Ohki, Akira Otsuka

Proceedings of the 2017 on Multimedia Privacy and Security, 2017

2016

Optimal sequential fusion for multibiometric cryptosystems.

Takao Murakami, Tetsushi Ohki, Kenta Takahashi

Inf. Fusion, 2016

2014

Theoretical vulnerability in likelihood-ratio-based biometric verification.

Tetsushi Ohki, Akira Otsuka

Proceedings of the IEEE International Joint Conference on Biometrics, Clearwater, 2014

A consideration on a common template-based biometric cryptosystem using on-line signatures.

Yuuki Goubaru, Yasushi Yamazaki, Takeru Miyazaki, Tetsushi Ohki

Proceedings of the IEEE 3rd Global Conference on Consumer Electronics, 2014

2013

Security performance evaluation for biometric template protection techniques.

Yoshiaki Isobe, Tetsushi Ohki, Naohisa Komatsu

Int. J. Biom., 2013

New Security Definitions for Biometric Authentication with Template Protection: Toward covering more threats against authentication systems.

Toshiyuki Isshiki, Toshinori Araki, Kengo Mori, Satoshi Obana, Tetsushi Ohki, Shizuo Sakamoto

Proceedings of the 2013 BIOSIG, 2013

2012

Evaluation of wolf attack for classified target on speaker verification systems.

Tetsushi Ohki, Seira Hidano, Tatsuya Takehisa

Proceedings of the 12th International Conference on Control Automation Robotics & Vision, 2012

Evaluation of security for biometric guessing attacks in biometric cryptosystem using fuzzy commitment scheme.

Seira Hidano, Tetsushi Ohki, Kenta Takahashi

Proceedings of the 2012 BIOSIG, 2012

2010

A metric of identification performance of biometrics based on information content.

Seira Hidano, Tetsushi Ohki, Naohisa Komatsu, Kenta Takahashi

Proceedings of the 11th International Conference on Control, 2010

2008

On biometric encryption using fingerprint and it's security evaluation.

Seira Hidano, Tetsushi Ohki, Naohisa Komatsu, Masao Kasahara

Proceedings of the 10th International Conference on Control, 2008

2006

Safety of templates in biometric person authentication using error-correcting code.

Tetsushi Ohki, Shiro Akatsuka, Naohisa Komatsu, Masao Kasahara

Proceedings of the Security, Steganography, and Watermarking of Multimedia Contents VIII, 2006