Pubilications

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Refereed Conference Proceedings

  1. Universally Composable Relaxed Asymmetric Password-Authenticated Key Exchange
    Shuya Hanai, Keisuke Tanaka, Masayuki Tezuka, Yusuke Yoshida
    SCN 2024 (September 2024)
    Acceptance Rate 33/93 = 35.5%
    [Proceedings] 
  2. 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)
    Acceptance Rate 31/78 = 39.7%
    [Proceedings]  [Slides]  [arXiv]
  3. Quantum Search-to-Decision Reduction for the LWE Problem
    Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida
    AFRICACRYPT 2023 (July 2023)
    Acceptance Rate 21/59 = 35.6%
    [Proceedings]  [ePrint]
  4. Pointcheval-Sanders Signature-Based Synchronized Aggregate Signature
    Masayuki Tezuka, Keisuke Tanaka
    ICISC 2022 (November-December 2022)
    Acceptance Rate 24/69 = 34.7%
    [Proceedings]  [Slides]  [arXiv]
  5. Forward Secure Message Franking
    Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
    ICISC 2021 (December 2021)
    Acceptance Rate 23/63 = 36.5%
    [Proceedings]
  6. Security Definitions on Time-Lock Puzzles
    Daiki Hiraga, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
    ICISC 2020 (December 2020)
    Acceptance Rate 15/51 = 29.4%
    [Proceedings]
  7. Watermarkable Signature with Computational Function Preserving
    Kyohei Sudo, Masayuki Tezuka, Keisuke Hara, Yusuke Yoshida, Keisuke Tanaka
    ProvSec 2020 (November-December 2020)
    Acceptance Rate 20/59 = 33.9%
    [Proceedings]
  8. Improved Security Proof for the Camenisch-Lysyanskaya Signature-Based Synchronized Aggregate Signature Scheme
    Masayuki Tezuka, Keisuke Tanaka
    ACISP 2020 (November-December 2020)
    Full-paper Acceptance Rate 31/151 = 20.5%
    [Proceedings]  [Slides]  [arXiv] 
  9. A t-out-of-n Redactable Signature Scheme
    Masayuki Tezuka, Xiangyu Su, Keisuke Tanaka
    CANS 2019 (October 2019)
    Full-paper Acceptance Rate 21/55 = 38.2%
    [Proceedings]  [Slides]  [arXiv]
  10. Weakened Random Oracle Models with Target Prefix
    Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka
    SecITC 2018 (November 2018)
    Acceptance Rate 35/70 = 50.0%
    [Proceedings]  [Slides]  [arXiv]

Refereed Journal Articles

  1. Quantum Search-to-Decision Reduction for the LWE Problem
    Kyohei Sudo, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida
    IEICE Trans.Fundamentals
    (Full version of [STHY23 @ AFRICACRYPT2023])
    [Article] 
  2. A Survey on Middle-Product Learning with Errors Cryptography
    Masayuki Tezuka, Keisuke Tanaka
    Mathematical Foundations for Post-Quantum Cryptography, Mathematics for Industry
    [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]