CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (Not mathtt q -type) Assumptions. - Toi Tomita; Wakaha Ogata; Kaoru Kurosawa (IWSEC, 2019)

Tight reduction for generic construction of certificateless signature and its instantiation from DDH assumption. - Keitaro Hashimoto; Wakaha Ogata; Toi Tomita (IACR Cryptol. ePrint Arch., 2019)

CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (not $ mathtt{q}$-type) Assumptions. - Toi Tomita; Wakaha Ogata; Kaoru Kurosawa; Ryo Kuwayama (IACR Cryptol. ePrint Arch., 2019)

CCA-Secure Leakage-Resilient Identity-Based Encryption without q-Type Assumptions. - Toi Tomita; Wakaha Ogata; Kaoru Kurosawa; Ryo Kuwayama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Boosting CPA to CCA2 for Leakage-Resilient Attribute-Based Encryption by Using New QA-NIZK. - Toi Tomita; Wakaha Ogata; Kaoru Kurosawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022)

Lattice-Based Multi-entity Identification Protocols. - Yohei Watanabe 001; Toi Tomita; Junji Shikata (MobiSec, 2023)

Compact Signature Aggregation from Module-Lattices. - Toi Tomita; Junji Shikata (IACR Cryptol. ePrint Arch., 2023)

Direct computation of branching programs and its applications to more efficient lattice-based cryptography. - Shuichi Katsumata; Toi Tomita; Shota Yamada 001 (Des. Codes Cryptogr., 2023)

How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption. - Sohto Chiku; Keisuke Hara; Keitaro Hashimoto; Toi Tomita; Junji Shikata (CANS (2), 2024)

Efficient Identity-Based Encryption with Tight Adaptive Anonymity from RLWE. - Toi Tomita; Junji Shikata (PQCrypto (1), 2024)

Compact and Tightly Secure (Anonymous) IBE from Module LWE in the QROM. - Toi Tomita; Junji Shikata (IACR Cryptol. ePrint Arch., 2024)

Design and Evaluation of User Interface for Server-Aided In-Brain Signature - for Server-Aided In-Brain Signature. - Ryunosuke Harada; Wataru Hatakeyama; Sena Enomoto; Kakeru Hasegawa; Toi Tomita; Kenta Takahashi; Wakaha Ogata; Masakatsu Nishigaki (HCI (63), 2025)

How to Use Your Brain for Cryptography Without Trustworthy Machines. - Wakaha Ogata; Toi Tomita; Kenta Takahashi; Masakatsu Nishigaki (IEEE Access, 2025)

Homomorphic Signature With Designated Evaluator. - Kazuma Shiraishi; Keisuke Hara; Toi Tomita; Kyosuke Yamashita; Junji Shikata (IEEE Access, 2025)