Sign in
Tetsushi Ohki
ORCID
Publication Activity (10 Years)
Years Active: 2006-2024
Publications (10 Years): 40
Top Topics
Palmprint
Top Venues
BWCCA
APSIPA
NBiS
IHSI
</>
Publications
</>
Kota Numada
,
Shinnosuke Nozaki
,
Takumi Takaiwa
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Perceiving Human Psychological Consistency: Attack Detection Against Advanced Persistent Social Engineering.
EIDWT
(2024)
Jun Narita
,
Takao Murakami
,
Hideitsu Hino
,
Masakatsu Nishigaki
,
Tetsushi Ohki
Synthesizing differentially private location traces including co-locations.
Int. J. Inf. Sec.
23 (1) (2024)
Takahiko Arakawa
,
Yuya Sato
,
Hitoshi Sakano
,
Tetsushi Ohki
Development of a Robust Ear Recognition Algorithm using Planar Approximation.
APSIPA ASC
(2023)
Mei Suzuki
,
Ryo Iijima
,
Kazuki Nomoto
,
Tetsushi Ohki
,
Tatsuya Mori
PinchKey: A Natural and User-Friendly Approach to VR User Authentication.
EuroUSEC
(2023)
Sana Okumura
,
Tomoya Amagasa
,
Tsubasa Shibata
,
Takumi Yamamoto
,
Tadakazu Yamanaka
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Scheme for Selection of Deceptions as a Countermeasure for Insider Threats.
BWCCA
(2023)
Ayumi Serizawa
,
Ryosuke Okudera
,
Yumo Ouchi
,
Mizuho Yoshihira
,
Yuya Shiomi
,
Naoya Nitta
,
Masataka Nakahara
,
Akira Baba
,
Yutaka Miyake
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Improving Palmprint-Region Estimation for ID-Less Palmprint Recognition.
BWCCA
(2022)
Shinnosuke Nozaki
,
Ayumi Serizawa
,
Mizuho Yoshihira
,
Masahiro Fujita
,
Yoichi Shibata
,
Tadakazu Yamanaka
,
Nori Matsuda
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Multi-observed Multi-factor Authentication: A Multi-factor Authentication Using Single Credential.
NBiS
(2022)
Mizuho Yoshihira
,
Ayumi Serizawa
,
Ryosuke Okudera
,
Yumo Ouchi
,
Yuya Shiomi
,
Naoya Nitta
,
Masataka Nakahara
,
Akira Baba
,
Yutaka Miyake
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Improving Rank-N Identification Rate of Palmprint Identification Using Permutation-Based Indexing.
HCI (32)
(2022)
Yusuke Shimizu
,
Tetsushi Ohki
,
Yusuke Yamamoto
Privacy-aware Snippets: Enhancing Assessment of Balance between Privacy Risks and Benefits in Web Search.
GoodIT
(2022)
Kohei Yagyu
,
Ren Takeuchi
,
Masakatsu Nishigaki
,
Tetsushi Ohki
Improving Classification Accuracy by Optimizing Activation Function for Convolutional Neural Network on Homomorphic Encryption.
BWCCA
(2022)
Takamichi Terada
,
Vo Ngoc Khoi Nguyen
,
Masakatsu Nishigaki
,
Tetsushi Ohki
Improving Robustness and Visibility of Adversarial CAPTCHA Using Low-Frequency Perturbation.
AINA (2)
(2022)
Muku Akasaka
,
Soshi Maeda
,
Yuya Sato
,
Masakatsu Nishigaki
,
Tetsushi Ohki
Model-Free Template Reconstruction Attack with Feature Converter.
BIOSIG
(2022)
Takumi Kitagawa
,
Tetsushi Ohki
,
Yuki Koizumi
,
Yoshinobu Kawabe
,
Toru Hasegawa
,
Masakatsu Nishigaki
Deterrence-Based Trust: A Study on Improving the Credibility of Social Media Messages in Disaster Using Registered Volunteers.
NBiS
(2021)
Jun Narita
,
Yayoi Suganuma
,
Masakatsu Nishigaki
,
Takao Murakami
,
Tetsushi Ohki
Synthesizing Privacy-Preserving Location Traces Including Co-locations.
DPM/CBT@ESORICS
(2021)
Hiroto Tamiya
,
Toshiyuki Isshiki
,
Kengo Mori
,
Satoshi Obana
,
Tetsushi Ohki
Improved Post-quantum-secure Face Template Protection System Based on Packed Homomorphic Encryption.
BIOSIG
(2021)
Vo Ngoc Khoi Nguyen
,
Takamichi Terada
,
Masakatsu Nishigaki
,
Tetsushi Ohki
Examining of Shallow Autoencoder on Black-box Attack against Face Recognition.
APSIPA ASC
(2021)
Yumo Ouchi
,
Ryosuke Okudera
,
Yuya Shiomi
,
Kota Uehara
,
Ayaka Sugimoto
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Study on Possibility of Estimating Smartphone Inputs from Tap Sounds.
APSIPA
(2020)
Koki Mukaihira
,
Yasuyoshi Jinno
,
Takashi Tsuchiya
,
Tetsushi Ohki
,
Kenta Takahashi
,
Wakaha Ogata
,
Masakatsu Nishigaki
Communication Protocol Between Humans and Bank Server Secure Against Man-in-the-Browser Attacks.
IHSI
(2020)
Yayoi Suganuma
,
Jun Narita
,
Masakatsu Nishigaki
,
Tetsushi Ohki
Understanding the Impact of Service Trials on Privacy Disclosure.
HCI (40)
(2020)
Ayaka Sugimoto
,
Yuya Shiomi
,
Akira Baba
,
Norihiro Okui
,
Tetsushi Ohki
,
Yutaka Miyake
,
Masakatsu Nishigaki
A Liveness Detection Method for Palmprint Authentication.
IHSI
(2020)
Yuya Shiomi
,
Genki Sugimoto
,
Ayaka Sugimoto
,
Kota Uehara
,
Masahiro Fujita
,
Yuto Mano
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Micro Biometric Authentication Using Fingernail Surfaces: A Study of Practical Use.
AINA
(2020)
Tetsushi Ohki
,
Vishu Gupta
,
Masakatsu Nishigaki
Efficient Spoofing Attack Detection against Unknown Sample using End-to-End Anomaly Detection.
APSIPA
(2019)
Yosuke Kaga
,
Masakazu Fujio
,
Kenta Takahashi
,
Tetsushi Ohki
,
Masakatsu Nishigaki
PDH : Probabilistic deep hashing based on MAP estimation of Hamming distance.
CoRR
(2019)
Takao Murakami
,
Tetsushi Ohki
,
Yosuke Kaga
,
Masakazu Fujio
,
Kenta Takahashi
Cancelable indexing based on low-rank approximation of correlation-invariant random filtering for fast and secure biometric identification.
Pattern Recognit. Lett.
126 (2019)
Yoshinobu Kawabe
,
Yuki Koizumi
,
Tetsushi Ohki
,
Masakatsu Nishigaki
,
Toru Hasegawa
,
Tetsuhisa Oda
On Trust Confusional, Trust Ignorant, and Trust Transitions.
IFIPTM
(2019)
Yosuke Kaga
,
Masakazu Fujio
,
Kenta Takahashi
,
Tetsushi Ohki
,
Masakatsu Nishigaki
PDH : Probabilistic Deep Hashing Based on Map Estimation of Hamming Distance.
ICIP
(2019)
Mohammad Jahanian
,
Toru Hasegawa
,
Yoshinobu Kawabe
,
Yuki Koizumi
,
Amr Magdy
,
Masakatsu Nishigaki
,
Tetsushi Ohki
,
K. K. Ramakrishnan
DiReCT: Disaster Response Coordination with Trusted Volunteers.
ICT-DM
(2019)
Takao Murakami
,
Ryo Fujita
,
Tetsushi Ohki
,
Yosuke Kaga
,
Masakazu Fujio
,
Kenta Takahashi
Cancelable Permutation-Based Indexing for Secure and Efficient Biometric Identification.
IEEE Access
7 (2019)
Toshiki Honda
,
Kohei Mukaiyama
,
Takeharu Shirai
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Ransomware Detection Considering User's Document Editing.
AINA
(2018)
Yosuke Takahashi
,
Masashi Endo
,
Hiroaki Matsuno
,
Hiroaki Muramatsu
,
Tetsushi Ohki
,
Masakatsu Nishigaki
A Study on Human Reflex-Based Biometric Authentication Using Eye-Head Coordination.
NBiS
(2018)
Genki Sugimoto
,
Masahiro Fujita
,
Yuto Mano
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Micro Disposable Biometric Authentication: An Application Using Fingernail Minute Textures for Nonsensitive Services.
ICBSP
(2018)
Takao Murakami
,
Tetsushi Ohki
,
Yosuke Kaga
,
Masakazu Fujio
,
Kenta Takahashi
Cancelable Indexing Based on Low-rank Approximation of Correlation-invariant Random Filtering for Fast and Secure Biometric Identification.
CoRR
(2018)
Aki Harada
,
Yasushi Yamazaki
,
Tetsushi Ohki
Biometric Bit String Generation for Smart-Phones Using Voice Data.
APSIPA
(2018)
Masakazu Fujio
,
Yosuke Kaga
,
Takao Murakami
,
Tetsushi Ohki
,
Kenta Takahashi
Face/Fingerphoto Spoof Detection under Noisy Conditions by using Deep Convolutional Neural Network.
BIOSIGNALS
(2018)
Keisuke Inoue
,
Toshiki Honda
,
Kohei Mukaiyama
,
Tetsushi Ohki
,
Masakatsu Nishigaki
Automatic Examination-Based Whitelist Generation for XSS Attack Detection.
BWCCA
(2018)
Tetsushi Ohki
,
Akira Otsuka
Theoretical vulnerabilities in map speaker adaptation.
ICASSP
(2017)
Yosuke Kaga
,
Masakazu Fujio
,
Ken Naganuma
,
Kenta Takahashi
,
Takao Murakami
,
Tetsushi Ohki
,
Masakatsu Nishigaki
A Secure and Practical Signature Scheme for Blockchain Based on Biometrics.
ISPEC
(2017)
Yasushi Yamazaki
,
Tetsushi Ohki
Toward More Secure and Convenient User Authentication in Smart Device Era.
IEICE Trans. Inf. Syst.
(10) (2017)
Tetsushi Ohki
,
Akira Otsuka
A Study on Autoencoder-based Reconstruction Method for Wi-Fi Location Data with Erasures.
MPS@CCS
(2017)
Takao Murakami
,
Tetsushi Ohki
,
Kenta Takahashi
Optimal sequential fusion for multibiometric cryptosystems.
Inf. Fusion
32 (2016)
Tetsushi Ohki
,
Akira Otsuka
Theoretical vulnerability in likelihood-ratio-based biometric verification.
IJCB
(2014)
Yuuki Goubaru
,
Yasushi Yamazaki
,
Takeru Miyazaki
,
Tetsushi Ohki
A consideration on a common template-based biometric cryptosystem using on-line signatures.
GCCE
(2014)
Toshiyuki Isshiki
,
Toshinori Araki
,
Kengo Mori
,
Satoshi Obana
,
Tetsushi Ohki
,
Shizuo Sakamoto
New Security Definitions for Biometric Authentication with Template Protection: Toward covering more threats against authentication systems.
BIOSIG
(2013)
Yoshiaki Isobe
,
Tetsushi Ohki
,
Naohisa Komatsu
Security performance evaluation for biometric template protection techniques.
Int. J. Biom.
5 (1) (2013)
Tetsushi Ohki
,
Seira Hidano
,
Tatsuya Takehisa
Evaluation of wolf attack for classified target on speaker verification systems.
ICARCV
(2012)
Seira Hidano
,
Tetsushi Ohki
,
Kenta Takahashi
Evaluation of security for biometric guessing attacks in biometric cryptosystem using fuzzy commitment scheme.
BIOSIG
(2012)
Seira Hidano
,
Tetsushi Ohki
,
Naohisa Komatsu
,
Kenta Takahashi
A metric of identification performance of biometrics based on information content.
ICARCV
(2010)
Seira Hidano
,
Tetsushi Ohki
,
Naohisa Komatsu
,
Masao Kasahara
On biometric encryption using fingerprint and it's security evaluation.
ICARCV
(2008)
Tetsushi Ohki
,
Shiro Akatsuka
,
Naohisa Komatsu
,
Masao Kasahara
Safety of templates in biometric person authentication using error-correcting code.
Security, Steganography, and Watermarking of Multimedia Contents
(2006)