Activities
Academic Services
- Journal Reviewer: Designs, Codes and Cryptography, ACM Transactions on Privacy and Security, IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences, IPSJ Journal
- Conference Reviewer: PKC 2026, EUROCRYPT 2026, ASIACRYPT 2025, CANS 2025, CRYPTO 2025, EUROCRYPT 2025, ASIACRYPT 2024, CRYPTO 2024, EUROCRYPT 2024, ASIACRYPT 2023, PKC 2023, PKC 2022, ACNS 2021
- Volunteer: IWSEC 2019
Invited Talks
- Towards Social Implementation of Secure IoT Devices
- New Concepts and Paradigms of Security for Next Generation 2026, January, 2026.
- Authentication in MLS and Its Variants.
- PEARG in IETF 122, March, 2025.
- How to Hide MetaData in MLS-Like Secure Group Messaging: Simple, Modular, and Post-Quantum.
- 22th Forum on Information Technology （FIT） 2023, September, 2023.
- A Concrete Treatment of Efficient Continuous Group Key Agreement via Multi-Recipient PKEs.
- Workshop on Cryptography and Information Security (WCIS) 2022, September, 2022.
- Design and Implementation of a Post-Quantum Authenticated Key Exchange Protocol for Signal.
- SCIS/CSS Invited Session in IWSEC, September, 2021.
Posters
- Identity-Based Matchmaking Encryption Revisited: Improved Constructions with Strong Security
- The 19th International Workshop on Security (IWSEC 2024), September, 2024.
Patents
- Method for hiding the identity of communication devices in a continuous group key agreement
- K Hashimoto, S Katsumata, T Prest, US Patent App. 19/033,305
Students
- Milan Gonzalez-Thauvin (École normale supérieure de Lyon)
- Internship, March--May, 2025
Teaching
- Jul. 2019 – Aug. 2019
- Teaching assembly programming to exchange students from Zhejiang University at summer school
- Apr. 2019 – Aug. 2019
- Teaching Assistant (C programming) at Tokyo Institute of Technology
- Apr. 2019 – Jun. 2019
- Teaching Assistant (Assembly programming) at Tokyo Institute of Technology
- Jun. 2018 – Aug. 2018
- Teaching Assistant (C programming) at Tokyo Institute of Technology