| 2023 | ESORICS | Threshold Fully Homomorphic Encryption Over the Torus. | Yukimasa Sugizaki, Hikaru Tsuchida, Takuya Hayashi, Koji Nuida, Akira Nakashima, Toshiyuki Isshiki, Kengo Mori |
| 2022 | ISITA | Hash-Chain-Based Sanitizable Signatures for Deletion and Generalization Processes. | Hikaru Tsuchida, Haruna Higo, Toshiyuki Isshiki, Kengo Mori |
| 2019 | ESORICS | 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 |
| 2013 | IWSEC | Attacks to the Proxy Re-Encryption Schemes from IWSEC2011. | Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka |
| 2013 | ProvSec | Factoring-Based Proxy Re-Encryption Schemes. | Toshiyuki Isshiki, Manh Ha Nguyen, Keisuke Tanaka |
| 2012 | Pairing | Controlled Joining on Encrypted Relational Database. | Jun Furukawa, Toshiyuki Isshiki |
| 2008 | PKC | Security of Digital Signature Schemes in Weakened Random Oracle Models. | Akira Numayama, Toshiyuki Isshiki, Keisuke Tanaka |
| 2005 | ACISP | An (n-t)-out-of-n Threshold Ring Signature Scheme. | Toshiyuki Isshiki, Keisuke Tanaka |