Keitaro Hashimoto

According to our database, Keitaro Hashimoto authored at least 10 papers between 2019 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of three.

2024

Chosen-ciphertext secure code-based threshold public key encryptions with short ciphertext.

Kota Takahashi, Keitaro Hashimoto, Wakaha Ogata

Des. Codes Cryptogr., February, 2024

Towards a Tightly Secure Signature in Multi-User Setting with Corruptions Based on Search Assumptions.

Hirofumi Yoshioka, Wakaha Ogata, Keitaro Hashimoto

IACR Cryptol. ePrint Arch., 2024

Security Model for Authenticated Key Exchange, Reconsidered.

Xichen Zhang, Keitaro Hashimoto, Wakaha Ogata

Proceedings of the Security and Cryptography for Networks - 14th International Conference, 2024

How to Apply Fujisaki-Okamoto Transformation to Registration-Based Encryption.

Sohto Chiku, Keisuke Hara, Keitaro Hashimoto, Toi Tomita, Junji Shikata

Proceedings of the Cryptology and Network Security - 23rd International Conference, 2024

2023

Identity-Based Matchmaking Encryption, Revisited: Strong Security and Practical Constructions from Standard Classical and Post-Quantum Assumptions.

Sohto Chiku, Keitaro Hashimoto, Keisuke Hara, Junji Shikata

IACR Cryptol. ePrint Arch., 2023

2022

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

J. Cryptol., 2022

How to Hide MetaData in MLS-Like Secure Group Messaging: Simple, Modular, and Post-Quantum.

Keitaro Hashimoto, Shuichi Katsumata, Thomas Prest

IACR Cryptol. ePrint Arch., 2022

2021

A Concrete Treatment of Efficient Continuous Group Key Agreement via Multi-Recipient PKEs.

Keitaro Hashimoto, Shuichi Katsumata, Eamonn W. Postlethwaite, Thomas Prest, Bas Westerbaan

IACR Cryptol. ePrint Arch., 2021

2019

Unrestricted and compact certificateless aggregate signature scheme.

Keitaro Hashimoto, Wakaha Ogata

Inf. Sci., 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