Toshiyuki Isshiki

22 papers B 1C 4Misc 3Journal 5Unranked 9
YearRankTypeTitle / Venue / Authors
2026 J jnl
Multi-Key Homomorphic Encryption with Threshold Re-Encryption via (Replicated) Additive Secret Sharing.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Akira Nakashima, Yukimasa Sugizaki, Hikaru Tsuchida, Takuya Hayashi, Koji Nuida, Kengo Mori, Toshiyuki Isshiki
2025 J jnl
Biometrically-independent fuzzy signatures: signing with biometrics without embedding them.
EURASIP J. Image Video Process.
Saki Otsuki, Haruna Higo, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana, Hiroto Tamiya, Kenji Yasunaga
2025 C conf
Biometrics Enhances Blockchain Wallet Governance.
ICBC
Saki Otsuki, Hiroto Tamiya, Kengo Mori, Toshiyuki Isshiki, Shin'ichiro Matsuo, Satoshi Obana
2024 — conf
Multi-key Homomorphic Encryption with Threshold Re-encryption.
SAC (1)
Akira Nakashima, Yukimasa Sugizaki, Hikaru Tsuchida, Takuya Hayashi, Koji Nuida, Kengo Mori, Toshiyuki Isshiki
2023 — conf
Fuzzy Signature with Biometric-Independent Verification.
BIOSIG
Haruna Higo, Toshiyuki Isshiki, Saki Otsuki, Kenji Yasunaga
2023 — conf
Threshold Fully Homomorphic Encryption Over the Torus.
ESORICS (1)
Yukimasa Sugizaki, Hikaru Tsuchida, Takuya Hayashi, Koji Nuida, Akira Nakashima, Toshiyuki Isshiki, Kengo Mori
2022 C conf
Hash-Chain-Based Sanitizable Signatures for Deletion and Generalization Processes.
ISITA
Hikaru Tsuchida, Haruna Higo, Toshiyuki Isshiki, Kengo Mori
2022 J jnl
Research on the TRM Kaizen Method for Governmental Organizations to Apply Technology Roadmapping as a Methodology to Achieve the Goals of Industrial Technology Policy.
IEEE Trans. Engineering Management
Masayoshi Watanabe, Yuto Nakagami, Toshiyuki Isshiki, Motoshi Kunugi, Yuko Yasunaga
2021 — conf
Improved Post-quantum-secure Face Template Protection System Based on Packed Homomorphic Encryption.
BIOSIG
Hiroto Tamiya, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana, Tetsushi Ohki
2019 — conf
Security Requirements for Store-on-Client and Verify-on-Server Secure Biometric Authentication.
ETAA@ESORICS
Haruna Higo, Toshiyuki Isshiki, Masahiro Nara, Satoshi Obana, Toshihiko Okamura, Hiroto Tamiya
2018 J jnl
Privacy-Preserving Fingerprint Authentication Resistant to Hill-Climbing Attacks.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Haruna Higo, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana
2015 Misc conf
Privacy-Preserving Fingerprint Authentication Resistant to Hill-Climbing Attacks.
SAC
Haruna Higo, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana
2013 Misc conf
Attacks to the Proxy Re-Encryption Schemes from IWSEC2011.
IWSEC
Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka
2013 C conf
Factoring-Based Proxy Re-Encryption Schemes.
ProvSec
Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka
2013 — conf
New Security Definitions for Biometric Authentication with Template Protection: Toward covering more threats against authentication systems.
BIOSIG
Toshiyuki Isshiki, Toshinori Araki, Kengo Mori, Satoshi Obana, Tetsushi Ohki, Shizuo Sakamoto
2013 B conf
Proxy Re-Encryption in a Stronger Security Model Extended from CT-RSA2012.
CT-RSA
Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka
2012 C conf
Controlled Joining on Encrypted Relational Database.
Pairing
Jun Furukawa, Toshiyuki Isshiki
2011 — conf
Flexible architecture optimization and ASIC implementation of group signature algorithm using a customized HLS methodology.
HOST
Sumio Morioka, Toshiyuki Isshiki, Satoshi Obana, Yuichi Nakamura, Kazue Sako
2010 J jnl
A Rational Secret-Sharing Scheme Based on RSA-OAEP.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Toshiyuki Isshiki, Koichiro Wada, Keisuke Tanaka
2008 — conf
Security of Digital Signature Schemes in Weakened Random Oracle Models.
Public Key Cryptography
Akira Numayama, Toshiyuki Isshiki, Keisuke Tanaka
2006 — conf
Using group signatures for identity management and its implementation.
Digital Identity Management
Toshiyuki Isshiki, Kengo Mori, Kazue Sako, Isamu Teranishi, Shoko Yonezawa
2005 Misc conf
An (n-t)-out-of-n Threshold Ring Signature Scheme.
ACISP
Toshiyuki Isshiki, Keisuke Tanaka