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Keitaro Hashimoto
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An efficient and generic construction for signal’s handshake (X3DH): post-quantum, state leakage secure, and deniable
K Hashimoto, S Katsumata, K Kwiatkowski, T Prest
Journal of Cryptology 35 (3), 17, 2022
342022
Unrestricted and compact certificateless aggregate signature scheme
K Hashimoto, W Ogata
Information Sciences 487, 97-114, 2019
262019
A concrete treatment of efficient continuous group key agreement via multi-recipient PKEs
K Hashimoto, S Katsumata, E Postlethwaite, T Prest, B Westerbaan
Proceedings of the 2021 ACM SIGSAC Conference on Computer and Communications …, 2021
162021
An efficient and generic construction for signal’s handshake (X3DH): post-quantum, state leakage secure and deniable
K Hashimoto, S Katsumata, K Kwiatkowski, T Prest
Cryptology ePrint Archive, Report 2021/616, 2021
6*2021
How to hide MetaData in MLS-like secure group messaging: simple, modular, and post-quantum
K Hashimoto, S Katsumata, T Prest
Proceedings of the 2022 ACM SIGSAC Conference on Computer and Communications …, 2022
52022
Chosen-ciphertext secure code-based threshold public key encryptions with short ciphertext
K Takahashi, K Hashimoto, W Ogata
Designs, Codes and Cryptography 92 (2), 277-301, 2024
12024
Identity-Based Matchmaking Encryption, Revisited: Strong Security and Practical Constructions from Standard Classical and Post-Quantum Assumptions
S Chiku, K Hashimoto, K Hara, J Shikata
Cryptology ePrint Archive, 2023
2023
Tight reduction for generic construction of certificateless signature and its instantiation from DDH assumption
K Hashimoto, W Ogata, T Tomita
Cryptology ePrint Archive, 2019
2019
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Articles 1–8