| 2026 | ACNS | (Re-)Formalization and Construction of Reusable and Robust Threshold Fuzzy Extractors. | Keisuke Hara, Keitaro Hashimoto, Takahiro Matsuda, Wataru Nakamura, Kenta Takahashi |
| 2026 | CRYPTO | Asymmetric Message Franking in the Plain Model: Generic and Efficient Constructions. | Milan Gonzalez-Thauvin, Keitaro Hashimoto |
| 2026 | SP | Revisiting PQ Wireguard: A Comprehensive Security Analysis with a New Design Using Reinforced KEMs. | Keitaro Hashimoto, Shuichi Katsumata, Guilhem Niot, Thom Wiggers |
| 2025 | IWSEC | Multi-designated Verifier Ring Signature: Generic Construction from Standard Primitives. | Yuuki Fujita, Keisuke Hara, Keitaro Hashimoto, Kyosuke Yamashita |
| 2025 | PKC | Key Revocation in Registered Attribute-Based Encryption. | Kyoichi Asano, Nuttapong Attrapadung, Keisuke Hara, Keitaro Hashimoto, Yohei Watanabe |
| 2024 | CANS | How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption. | Sohto Chiku, Keisuke Hara, Keitaro Hashimoto, Toi Tomita, Junji Shikata |
| 2024 | SCN | Security Model for Authenticated Key Exchange, Reconsidered. | Xichen Zhang, Keitaro Hashimoto, Wakaha Ogata |
| 2022 | CCS | How to Hide MetaData in MLS-Like Secure Group Messaging: Simple, Modular, and Post-Quantum. | Keitaro Hashimoto, Shuichi Katsumata, Thomas Prest |
| 2021 | CCS | A Concrete Treatment of Efficient Continuous Group Key Agreement via Multi-Recipient PKEs. | Keitaro Hashimoto, Shuichi Katsumata, Eamonn W. Postlethwaite, Thomas Prest, Bas Westerbaan |
| 2021 | PKC | An Efficient and Generic Construction for Signal's Handshake (X3DH): Post-Quantum, State Leakage Secure, and Deniable. | Keitaro Hashimoto, Shuichi Katsumata, Kris Kwiatkowski, Thomas Prest |