Pubilications

>>日本語版

Refereed Conference Proceedings

  1. 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] 
  2. Universally Composable Relaxed Asymmetric Password-Authenticated Key Exchange
    Shuya Hanai, Keisuke Tanaka, Masayuki Tezuka, Yusuke Yoshida
    SCN 2024 (September 2024)
    [Proceedings]  [ePrint]
  3. 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]
  4. Quantum Search-to-Decision Reduction for the LWE Problem
    Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida
    AFRICACRYPT 2023 (July 2023)
    [Proceedings]  [ePrint]
  5. Pointcheval-Sanders Signature-Based Synchronized Aggregate Signature
    Masayuki Tezuka, Keisuke Tanaka
    ICISC 2022 (November-December 2022)
    [Proceedings]  [Slides]  [arXiv]
  6. Forward Secure Message Franking
    Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
    ICISC 2021 (December 2021)
    [Proceedings]
  7. Security Definitions on Time-Lock Puzzles
    Daiki Hiraga, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
    ICISC 2020 (December 2020)
    [Proceedings]
  8. Watermarkable Signature with Computational Function Preserving
    Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida, Keisuke Tanaka
    ProvSec 2020 (November-December 2020)
    [Proceedings]
  9. 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] 
  10. A t-out-of-n Redactable Signature Scheme
    Masayuki Tezuka, Xiangyu Su, Keisuke Tanaka
    CANS 2019 (October 2019)
    [Proceedings]  [Slides]  [arXiv]
  11. Weakened Random Oracle Models with Target Prefix
    Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
    SecITC 2018 (November 2018)
    [Proceedings]  [Slides]  [arXiv]

Refereed Journal Articles

  1. A Survey on Middle-Product Learning with Errors Cryptography
    Masayuki Tezuka, Keisuke Tanaka
    Mathematical Foundations for Post-Quantum Cryptography, Mathematics for Industry
    [Article] 
  2. 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] 
  3. 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]
  4. 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]
  5. Redactable Signature with Compactness from Set-Commitment
    Masayuki Tezuka, Keisuke Tanaka
    IEICE Trans.Fundamentals Vol.E104-A, No.09 (September 2021)
    [Article]  [arXiv]

Preprints

  1. On the Relationship between FuncCPA and FuncCPA+
    Takumi Shinozaki, Keisuke Tanaka, Masayuki Tezuka, Yusuke Yoshida
    [ePrint]