Toshiyuki Isshiki

According to our database, Toshiyuki Isshiki authored at least 20 papers between 2005 and 2025.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2025

Biometrically-independent fuzzy signatures: signing with biometrics without embedding them.

Saki Otsuki, Haruna Higo, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana, Hiroto Tamiya, Kenji Yasunaga

EURASIP J. Image Video Process., December, 2025

Biometrics Enhances Blockchain Wallet Governance.

Saki Otsuki, Hiroto Tamiya, Kengo Mori, Toshiyuki Isshiki, Shin'Ichiro Matsuo, Satoshi Obana

Proceedings of the 2025 IEEE International Conference on Blockchain and Cryptocurrency, 2025

2024

Multi-key Homomorphic Encryption with Threshold Re-encryption.

Akira Nakashima, Yukimasa Sugizaki, Hikaru Tsuchida, Takuya Hayashi, Koji Nuida, Kengo Mori, Toshiyuki Isshiki

Proceedings of the Selected Areas in Cryptography - SAC 2024, 2024

2023

Threshold Fully Homomorphic Encryption Over the Torus.

Yukimasa Sugizaki, Hikaru Tsuchida, Takuya Hayashi, Koji Nuida, Akira Nakashima, Toshiyuki Isshiki, Kengo Mori

Proceedings of the Computer Security - ESORICS 2023, 2023

Fuzzy Signature with Biometric-Independent Verification.

Haruna Higo, Toshiyuki Isshiki, Saki Otsuki, Kenji Yasunaga

Proceedings of the 22nd International Conference of the Biometrics Special Interest Group, 2023

2022

Research on the TRM Kaizen Method for Governmental Organizations to Apply Technology Roadmapping as a Methodology to Achieve the Goals of Industrial Technology Policy.

Masayoshi Watanabe, Yuto Nakagami, Toshiyuki Isshiki, Motoshi Kunugi, Yuko Yasunaga

IEEE Trans. Engineering Management, 2022

Hash-Chain-Based Sanitizable Signatures for Deletion and Generalization Processes.

Hikaru Tsuchida, Haruna Higo, Toshiyuki Isshiki, Kengo Mori

Proceedings of the International Symposium on Information Theory and Its Applications, 2022

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

2019

Security Requirements for Store-on-Client and Verify-on-Server Secure Biometric Authentication.

Haruna Higo, Toshiyuki Isshiki, Masahiro Nara, Satoshi Obana, Toshihiko Okamura, Hiroto Tamiya

Proceedings of the Emerging Technologies for Authorization and Authentication, 2019

2018

Privacy-Preserving Fingerprint Authentication Resistant to Hill-Climbing Attacks.

Haruna Higo, Toshiyuki Isshiki, Kengo Mori, Satoshi Obana

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2018

2013

Factoring-Based Proxy Re-Encryption Schemes.

Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka

Proceedings of the Provable Security - 7th International Conference, 2013

Attacks to the Proxy Re-Encryption Schemes from IWSEC2011.

Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka

Proceedings of the Advances in Information and Computer Security, 2013

Proxy Re-Encryption in a Stronger Security Model Extended from CT-RSA2012.

Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka

Proceedings of the Topics in Cryptology - CT-RSA 2013, 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

Controlled Joining on Encrypted Relational Database.

Jun Furukawa, Toshiyuki Isshiki

Proceedings of the Pairing-Based Cryptography - Pairing 2012, 2012

2011

Flexible architecture optimization and ASIC implementation of group signature algorithm using a customized HLS methodology.

Sumio Morioka, Toshiyuki Isshiki, Satoshi Obana, Yuichi Nakamura, Kazue Sako

Proceedings of the HOST 2011, 2011

2010

A Rational Secret-Sharing Scheme Based on RSA-OAEP.

Toshiyuki Isshiki, Koichiro Wada, Keisuke Tanaka

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

2008

Security of Digital Signature Schemes in Weakened Random Oracle Models.

Akira Numayama, Toshiyuki Isshiki, Keisuke Tanaka

Proceedings of the Public Key Cryptography, 2008

2006

Using group signatures for identity management and its implementation.

Toshiyuki Isshiki, Kengo Mori, Kazue Sako, Isamu Teranishi, Shoko Yonezawa

Proceedings of the 2006 Workshop on Digital Identity Management, 2006

2005

An (n-t)-out-of-n Threshold Ring Signature Scheme.

Toshiyuki Isshiki, Keisuke Tanaka

Proceedings of the Information Security and Privacy, 10th Australasian Conference, 2005