Pubilications
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Refereed Conference Proceedings
- Practical Quantum Public Key Encryption from One-way Functions
Kyohei Sudo, Keisuke Fujii, Keisuke Hara, Kosuke Ito, Masayuki Tezuka, Yusuke Yoshida
APKC 2025 (August 2025)
[Proceedings]
- Universally Composable Relaxed Asymmetric Password-Authenticated Key Exchange
Shuya Hanai, Keisuke Tanaka, Masayuki Tezuka, Yusuke Yoshida
SCN 2024 (September 2024)
[Proceedings]
[ePrint]
- 1-out-of-n Oblivious Signatures: Security Revisited and a Generic Construction with an Efficient Communication Cost
Masayuki Tezuka, Keisuke Tanaka
ICISC 2023 (November-December 2023)
[Proceedings]
[Slides]
[arXiv]
- Quantum Search-to-Decision Reduction for the LWE Problem
Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida
AFRICACRYPT 2023 (July 2023)
[Proceedings]
[ePrint]
- Pointcheval-Sanders Signature-Based Synchronized Aggregate Signature
Masayuki Tezuka, Keisuke Tanaka
ICISC 2022 (November-December 2022)
[Proceedings]
[Slides]
[arXiv]
- Forward Secure Message Franking
Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
ICISC 2021 (December 2021)
[Proceedings]
- Security Definitions on Time-Lock Puzzles
Daiki Hiraga, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
ICISC 2020 (December 2020)
[Proceedings]
- Watermarkable Signature with Computational Function Preserving
Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida, Keisuke Tanaka
ProvSec 2020 (November-December 2020)
[Proceedings]
- Improved Security Proof for the Camenisch-Lysyanskaya Signature-Based Synchronized Aggregate Signature Scheme
Masayuki Tezuka, Keisuke Tanaka
ACISP 2020 (November-December 2020)
[Proceedings]
[Slides]
[arXiv]
- A t-out-of-n Redactable Signature Scheme
Masayuki Tezuka, Xiangyu Su, Keisuke Tanaka
CANS 2019 (October 2019)
[Proceedings]
[Slides]
[arXiv]
- Weakened Random Oracle Models with Target Prefix
Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
SecITC 2018 (November 2018)
[Proceedings]
[Slides]
[arXiv]
Refereed Journal Articles
- A Survey on Middle-Product Learning with Errors Cryptography
Masayuki Tezuka, Keisuke Tanaka
Mathematical Foundations for Post-Quantum Cryptography, Mathematics for Industry
[Article]
- Quantum Search-to-Decision Reduction for the LWE Problem
Kyohei Sudo, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida
IEICE Trans.Fundamentals Vol. E108-A No.02 (February)
(Full version of [STHY23 @ AFRICACRYPT2023])
[Article]
- Forward Secure Message Franking with Updatable Reporting Tags
Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
IEICE Trans.Fundamentals Vol.E106-A, No.09 (September 2023)
(Full version of [YHTYT21 @ ICISC 2021])
[Article]
- Watermarkable Signature with Computational Function Preserving
Kyohei Sudo, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
IEICE Trans.Fundamentals Vol.E104-A, No.09 (September 2021)
(Full version of [STHYT20 @ ProvSec2020])
[Article]
- Redactable Signature with Compactness from Set-Commitment
Masayuki Tezuka, Keisuke Tanaka
IEICE Trans.Fundamentals Vol.E104-A, No.09 (September 2021)
[Article]
[arXiv]
Preprints
- On the Relationship between FuncCPA and FuncCPA+
Takumi Shinozaki, Keisuke Tanaka, Masayuki Tezuka, Yusuke Yoshida
[ePrint]