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Security analysis and development of post-quantum cryptography using the theory of Grobner bases

Research Project

Project/Area Number 22K17889
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 60070:Information security-related
Research InstitutionKyushu University

Principal Investigator

Ikematsu Yasuhiko  九州大学, マス・フォア・インダストリ研究所, 准教授 (40833570)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2024: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords耐量子計算機暗号 / 多変数多項式暗号 / グレブナー基底 / 暗号理論
Outline of Research at the Start

量子計算機を用いた攻撃に耐性のある暗号(耐量子計算機暗号:PQC)の研究開発は、アメリカ国立標準技術研究所(NIST)が現在進めているPQC標準化計画によって一気に加速した。PQCでは、多変数多項式写像を使った暗号(MPKC)が、高速な処理性能や短い署名長などから、有力な候補として活発に研究されている。しかし、既存MPKC方式に対する多変数連立方程式求解問題(MP問題)への安全性帰着証明や、実際に帰着できるような方式の開発は未解決問題となっている。本研究では、この問題に取り組む。

Outline of Final Research Achievements

In this research, we analyzed the security of post-quantum cryptography (PQC) and developed PQC related to Grobner bases. In particular, we analyzed the security of multivariate public key cryptography (MPKC), proposed a new attack on the multivariate signature scheme UOV, analyzed the Hilbert series associated with its public key, and proposed an improved scheme QR-UOV. As a major achievement, we submitted QR-UOV to the PQC standardization project of the U.S. government agency NIST, and it was accepted as a second round candidate. In this PQC standardization project, we also analyzed the security of several multivariate signature schemes using the attack described above and pointed out there were some problems with their proposed parameters.

Academic Significance and Societal Importance of the Research Achievements

多変数多項式暗号を中心に幾つかの耐量子計算機暗号(PQC)の安全性は代数的な問題に帰着されグレブナー基底などの代数方程式求解手法を用いて安全性解析がなされる。そのためこのような研究を通して代数方程式求解手法やその計算量評価を進展させることは非常に重要となる。また、RSA暗号からPQCへの移行が将来的に予定されている今、PQCは今後より重要性を増していくため、本研究課題で得られた成果は重要な社会的意義を持つと考えれる。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (19 results)

All 2025 2024 2023 2022

All Journal Article (11 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] A New Cryptanalysis Against UOV-Based Variants MAYO, QR-UOV and VOX2025

    • Author(s)
      Furue Hiroki、Ikematsu Yasuhiko
    • Journal Title

      IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

      Volume: E108.A Issue: 3 Pages: 174-182

    • DOI

      10.1587/transfun.2024CIP0003

    • ISSN
      0916-8508, 1745-1337
    • Year and Date
      2025-03-01
    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] NIST PQC Additional Signatures Second Round Candidate: QR-UOV2025

    • Author(s)
      Hiroki Furue, Yasuhiko Ikematsu, Fumitaka Hoshino, Tsuyoshi Takagi, Haruhisa Kosuge, Kimihiro Yamakoshi, Rika Akiyama, Satoshi Nakamura, Shingo Orihara, Koha Kinjo
    • Journal Title

      2025 Symposium on Cryptography and Information Security (SCIS2025)

      Volume: -

    • Related Report
      2024 Annual Research Report
  • [Journal Article] Revisiting the security analysis of SNOVA2024

    • Author(s)
      Ikematsu Yasuhiko、Akiyama Rika
    • Journal Title

      APKC '24: Proceedings of the 11th ACM Asia Public-Key Cryptography Workshop

      Volume: - Pages: 54-61

    • DOI

      10.1145/3659467.3659900

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] UOV 署名方式の変種に対するCSS2023 で提案した グレブナー基底計算アルゴリズムによる計算量評価2024

    • Author(s)
      坂田康亮, 池松泰彦
    • Journal Title

      Computer Security Symposium 2024

      Volume: -

    • Related Report
      2024 Annual Research Report
  • [Journal Article] On the Hybrid Method of Rectangular MinRank and Intersection Attacks against UOV2024

    • Author(s)
      Hiroki Furue, Yasuhiko Ikematsu
    • Journal Title

      Computer Security Symposium 2024

      Volume: -

    • Related Report
      2024 Annual Research Report
  • [Journal Article] Hilbert Series for Systems of UOV Polynomials2024

    • Author(s)
      Yasuhiko Ikematsu, Tsunekazu Saito
    • Journal Title

      IEICE Transaction on Fundamentals of Electronics, Communications and Computer Sciences (Special Section on Cryptography and Information Security)

      Volume: Vol.E107-A, No.3 Pages: 275-282

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] UOV多項式系に対するRectangular MinRank攻撃の計算量評価についての考察2024

    • Author(s)
      池松 泰彦, 古江 弘樹
    • Journal Title

      2024 Symposium on Cryptography and Information Security (SCIS2024)

      Volume: -

    • Related Report
      2023 Research-status Report
  • [Journal Article] Further Security Analysis for Multivariate Polynomial Signature Scheme QR-UOV2024

    • Author(s)
      Hiroki Furue, Yasuhiko Ikematsu, Fumitaka Hoshino, Tsuyoshi Takagi, Kan Yasuda, Toshiyuki Miyazawa, Akira Nagai, Rika Akiyama, Koha Kinjo
    • Journal Title

      2024 Symposium on Cryptography and Information Security (SCIS2024)

      Volume: -

    • Related Report
      2023 Research-status Report
  • [Journal Article] A security analysis on MQ-Sign2023

    • Author(s)
      Yasuhiko Ikematsu, Hyungrok Jo, Takanori Yasuda
    • Journal Title

      Proceedings of the 24th World Conference on Information Security Applications (WISA 2023)

      Volume: LNCS 14402 Pages: 40-51

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] A New Security Analysis Against MAYO and QR-UOV Using Rectangular MinRank Attack2023

    • Author(s)
      Hiroki Furue, Yasuhiko Ikematsu
    • Journal Title

      Proceedings of IWSEC 2023

      Volume: LNCS 14128 Pages: 101-116

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] 韓国PQC標準化計画(KpqC)で提案されたMQ-Signの安全性解析2023

    • Author(s)
      池松 泰彦, Hyungrok Jo, 安田 貴徳
    • Journal Title

      電子情報通信学会技術研究報告

      Volume: Vol.123, No.129, ISEC2023-31 Pages: 113-118

    • Related Report
      2023 Research-status Report
  • [Presentation] New security analysis for UOV-based signature candidates with small public key size2024

    • Author(s)
      Yasuhiko Ikematsu
    • Organizer
      5th NIST PQC Standardization conference
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Revisiting the security analysis of SNOVA2024

    • Author(s)
      Yasuhiko Ikematsu
    • Organizer
      The 11th ACM ASIA Public-Key Cryptography Workshop (APKC2024)
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] UOV署名方式とその改良2024

    • Author(s)
      池松泰彦
    • Organizer
      耐量子署名方式の設計と安全性の数理
    • Related Report
      2024 Annual Research Report
  • [Presentation] 多変数署名方式とその安全性解析について2024

    • Author(s)
      池松泰彦
    • Organizer
      第7回情報数理セミナー
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] UOV多項式系に対するRectangular MinRank攻撃の計算量評価についての考察2024

    • Author(s)
      池松 泰彦, 古江 弘樹
    • Organizer
      2024 Symposium on Cryptography and Information Security (SCIS2024)
    • Related Report
      2023 Research-status Report
  • [Presentation] A MinRank attack against variants of UOV signature scheme2023

    • Author(s)
      Hiroki Furue, Yasuhiko Ikematsu
    • Organizer
      2023 Symposium on Cryptography and Information Security
    • Related Report
      2022 Research-status Report
  • [Presentation] UOV署名方式に付随するHilbert級数について2022

    • Author(s)
      池松 泰彦
    • Organizer
      IMI暗号学セミナー
    • Related Report
      2022 Research-status Report
  • [Presentation] UOV 多項式系に対する Hilbert 級数について2022

    • Author(s)
      池松 泰彦, 清村 優太郎, 齋藤 恆和
    • Organizer
      コンピュータセキュリティシンポジウム2022(CSS2022)
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2026-01-16  

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