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Hashimoto Yasufumi  橋本 康史

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HASHIMOTO Yasufumi  橋本 康史

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Researcher Number 30452733
Other IDs
Affiliation (Current) 2025: 琉球大学, 理学部, 教授
Affiliation (based on the past Project Information) *help 2025: 琉球大学, 理学部, 准教授
2016 – 2023: 琉球大学, 理学部, 准教授
2014 – 2015: 琉球大学, 理学部, 助教
2010: (財)九州先端科学技術研究所, 研究員
2010: Institute of Systems & Information Technologies KYUSHU, 情報セキュリティ研究室, 研究員 … More
2009 – 2010: Institute of Systems & Information Technologies KYUSHU, 情報セキュリティ研究室, 研究員
2008 – 2010: 財団法人九州先端科学技術研究所, 研究員
2008: Institute of Systems & Information Technologies KYUSHU, 情報セキユリティ研究室, 研究員 Less
Review Section/Research Field
Principal Investigator
Algebra / Basic Section 11010:Algebra-related
Except Principal Investigator
Fundamental theory of informatics
Keywords
Principal Investigator
セルバーグゼータ関数 / length spectrum / 跡公式 / 普遍性定理 / ラプラシアンのスペクトル / セルバーグ跡公式 / ラプラシアン / 素測地線定理 / ゼータ関数 / スペクトル … More / 素測地線 / 2次形式の類数 / 双曲多様体 / 不定値2元2次形式の類数 / 不定値2元2次形式 / 不定値二元二次形式 / 合同部分群 / リーマン面 / 素元定理 / Length spectrum … More
Except Principal Investigator
プライバシ / 普遍安全性 / 安全性検証 / プライバシー保護 / データマイニング / 暗号 Less
  • Research Projects

    (6 results)
  • Research Products

    (118 results)
  • Co-Researchers

    (9 People)
  •  数論的な双曲多様体上のセルバーグゼータ関数の研究Principal Investigator

    • Principal Investigator
      橋本 康史
    • Project Period (FY)
      2025 – 2027
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 11010:Algebra-related
    • Research Institution
      University of the Ryukyus
  •  双曲多様体上の素測地線分布とセルバーグゼータ関数の研究Principal Investigator

    • Principal Investigator
      橋本 康史
    • Project Period (FY)
      2022 – 2024
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 11010:Algebra-related
    • Research Institution
      University of the Ryukyus
  •  Research on distributions of prime geodesics and spectrum using trace formula and zeta functionsPrincipal Investigator

    • Principal Investigator
      Hashimoto Yasufumi
    • Project Period (FY)
      2017 – 2022
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      University of the Ryukyus
  •  Research on distributions of prime geodesics and spectra of Laplacians on hyperbolic manifoldsPrincipal Investigator

    • Principal Investigator
      HASHIMOTO Yasufumi
    • Project Period (FY)
      2014 – 2016
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Algebra
    • Research Institution
      University of the Ryukyus
  •  Design and Security Analysis of Cryptographic Protocol for Privacy-Preserving Data Mining

    • Principal Investigator
      SAKURAI Kouichi
    • Project Period (FY)
      2008 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Fundamental theory of informatics
    • Research Institution
      Kyushu University
  •  Research on density theorems and invariants with zeta functions and trace formulasPrincipal Investigator

    • Principal Investigator
      HASHIMOTO Yasufumi
    • Project Period (FY)
      2008 – 2010
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Algebra
    • Research Institution
      Institute of Systems & Information Technologies KYUSHU

All 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2011 2010 2009 2008 Other

All Journal Article Presentation

  • [Journal Article] Universality theorems of Selberg zeta functions for arithmetic groups2024

    • Author(s)
      Hashimoto Yasufumi
    • Journal Title

      The Quarterly Journal of Mathematics

      Volume: 75 Issue: 1 Pages: 219-238

    • DOI

      10.1093/qmath/haae006

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Journal Article] Solving the Problem of Blockwise Isomorphism of Polynomials with Circulant Matrices2023

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      IEICE Trans. Fundamentals

      Volume: E106.A Issue: 3 Pages: 185-192

    • DOI

      10.1587/transfun.2022CIP0002

    • ISSN
      0916-8508, 1745-1337
    • Year and Date
      2023-03-01
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181, KAKENHI-PROJECT-22K03234
  • [Journal Article] Square integrals of the logarithmic derivatives of Selberg’s zeta functions in the critical strip2023

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      International Journal of Number Theor

      Volume: 19 Issue: 04 Pages: 747-756

    • DOI

      10.1142/s1793042123500379

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17K05181, KAKENHI-PROJECT-22K03234
  • [Journal Article] An improvement of algorithms to solve under-defined systems of multivariate quadratic equations2023

    • Author(s)
      Hashimoto Yasufumi
    • Journal Title

      JSIAM Letters

      Volume: 15 Issue: 0 Pages: 53-56

    • DOI

      10.14495/jsiaml.15.53

    • ISSN
      1883-0609, 1883-0617
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Journal Article] Key recovery attack on Hufu-UOV2022

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      JSIAM Letters

      Volume: 14 Issue: 0 Pages: 1-4

    • DOI

      10.14495/jsiaml.14.1

    • NAID

      130008145019

    • ISSN
      1883-0609, 1883-0617
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-22K03234, KAKENHI-PROJECT-17K05181
  • [Journal Article] Solving the Problem of Blockwise Isomorphism of Polynomials with Circulant Matrices2021

    • Author(s)
      Hashimoto Yasufumi
    • Journal Title

      Springer LNCS

      Volume: 12835 Pages: 137-150

    • DOI

      10.1007/978-3-030-85987-9_8

    • ISBN
      9783030859862, 9783030859879
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Selberg's zeta function for the modular group in the critical strip2021

    • Author(s)
      Hashimoto Yasufumi
    • Journal Title

      Mathematische Nachrichten

      Volume: 294 Issue: 10 Pages: 1899-1904

    • DOI

      10.1002/mana.202000268

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Vulnerability of Diene-Thabet-Yusuf's cubic multivariate signature scheme,2021

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      Ryukyu Mathematical Journal

      Volume: 34 Pages: 1-5

    • NAID

      120007182128

    • Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Selberg's zeta function for the modular group in the critical strip2021

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      Mathematische Nachrichten

      Volume: 未定

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Recent Developments in Multivariate Public Key Cryptosystems2020

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      International Symposium on Mathematics, Quantum Theory, and Cryptography

      Volume: - Pages: 209-229

    • DOI

      10.1007/978-981-15-5191-8_16

    • ISBN
      9789811551901, 9789811551918
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Key recovery attack on Circulant UOV/Rainbow2019

    • Author(s)
      Y. Hashimoto
    • Journal Title

      JSIAM Letters

      Volume: 11 Issue: 0 Pages: 45-48

    • DOI

      10.14495/jsiaml.11.45

    • NAID

      130007696300

    • ISSN
      1883-0609, 1883-0617
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 20172019

    • Author(s)
      Y. Hashimoto, Y. Ikematsu, T. Takagi
    • Journal Title

      Journal of Information Processing

      Volume: 27 Issue: 0 Pages: 517-524

    • DOI

      10.2197/ipsjjip.27.517

    • NAID

      130007706936

    • ISSN
      1882-6652
    • Language
      Japanese
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Asymptotic behaviors of class number sums associated with Pell-type equations2019

    • Author(s)
      Y. Hashimoto
    • Journal Title

      Mathematische Zeitschrift

      Volume: 292 Issue: 1-2 Pages: 641-654

    • DOI

      10.1007/s00209-018-2139-5

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Recent developments in multivariate public key cryptosystems2019

    • Author(s)
      Y. Hashimoto
    • Journal Title

      MI Lecture Notes

      Volume: 81 Pages: 187-205

    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 20172019

    • Author(s)
      Y. Hashimoto, Y. Ikematsu, T. Takagi
    • Journal Title

      IPSJ Journal

      Volume: 印刷中

    • NAID

      130007706936

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] High-rank attack on HMFEv2018

    • Author(s)
      Y. Hashimoto
    • Journal Title

      JSIAM Letters

      Volume: 10 Issue: 0 Pages: 21-24

    • DOI

      10.14495/jsiaml.10.21

    • NAID

      130007404541

    • ISSN
      1883-0609, 1883-0617
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 20172018

    • Author(s)
      Y. Hashimoto, Y. Ikematsu, T. Takagi
    • Journal Title

      Springer LNCS

      Volume: 11049 Pages: 3-18

    • DOI

      10.1007/978-3-319-97916-8_1

    • NAID

      130007706936

    • ISBN
      9783319979151, 9783319979168
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] On the security of Zhang-Tan's variants of multivariate signature schemes2018

    • Author(s)
      Y. Hashimoto
    • Journal Title

      Ryukyu Mathematical Journal

      Volume: 31 Pages: 1-5

    • Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Key Recovery Attacks on Multivariate Public Key Cryptosystems Derived from Quadratic Forms over an Extension Field2017

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      IEICE Trans. Fundamentals

      Volume: E100.A Issue: 1 Pages: 18-25

    • DOI

      10.1587/transfun.E100.A.18

    • NAID

      130005180815

    • ISSN
      0916-8508, 1745-1337
    • Language
      English
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26800020, KAKENHI-PROJECT-17K05181
  • [Journal Article] Chosen ciphertext attack on ZHFE2017

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      JSIAM Letters

      Volume: 9 Issue: 0 Pages: 21-24

    • DOI

      10.14495/jsiaml.9.21

    • NAID

      130005540822

    • ISSN
      1883-0609, 1883-0617
    • Language
      English
    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-26800020, KAKENHI-PROJECT-17K05181
  • [Journal Article] Weaknesses of cubic UOV and its variants2017

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      Ryukyu mathematical journal

      Volume: 30 Pages: 1-7

    • NAID

      120006378227

    • Open Access
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Multivariate public key cryptosystems2017

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      Mathematical Modelling for Next-Generation Cryptography

      Volume: 1 Pages: 17-42

    • DOI

      10.1007/978-981-10-5065-7_2

    • ISBN
      9789811050640, 9789811050657
    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Journal Article] Cryptanalysis of the Multivariate Signature Scheme Proposed in PQCrypto 20132016

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      IEICE Trans. Fundamentals

      Volume: E99.A Issue: 1 Pages: 58-65

    • DOI

      10.1587/transfun.E99.A.58

    • NAID

      130005115261

    • ISSN
      0916-8508, 1745-1337
    • Language
      English
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Journal Article] 合同部分群に関するlength spectrumの重複度について2016

    • Author(s)
      橋本康史
    • Journal Title

      数理解析研究所講究録

      Volume: 2013 Pages: 100-109

    • NAID

      130008004926

    • Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Journal Article] 合同部分群に関するlength spectrum の重複度について2016

    • Author(s)
      橋本康史
    • Journal Title

      数理解析研究所講究録

      Volume: 未定

    • NAID

      130008004926

    • Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Journal Article] Cryptanalysis of the quaternion Rainbow2015

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

      Volume: 98-A Pages: 144-152

    • DOI

      10.1007/978-3-642-41383-4_16

    • NAID

      130004770900

    • ISBN
      9783642413827, 9783642413834
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Journal Article] Cryptanalysis of the multivariate sigature scheme proposed in PQCrypto 20132014

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      Springer Lecture Notes in Computer Science

      Volume: 8772 Pages: 108-125

    • DOI

      10.1007/978-3-319-11659-4_7

    • ISBN
      9783319116587, 9783319116594
    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Journal Article] A polynomial-time algorithm for solving a class of underdetermined multivariate quadratic equations2014

    • Author(s)
      C.-M. Cheng, Y. Hashimoto, H. Miura, and T. Takagi
    • Journal Title

      6th International Workshop on Post-Quantum Cryptography, PQCrypto 2014

      Volume: LNCS 8772 Pages: 40-58

    • DOI

      10.1007/978-3-319-11659-4_3

    • ISBN
      9783319116587, 9783319116594
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-13F03346, KAKENHI-PROJECT-25540047, KAKENHI-PROJECT-26800020
  • [Journal Article] Algorithms to solve massively under-defined systems of multivariate quadratic equations2011

    • Author(s)
      Y.Hashimoto
    • Journal Title

      IEICE Trans.Fundamentals

      Volume: E94-A(未定)

    • NAID

      10029802211

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] On small secret key attack against RSA with high bits known prime factors2010

    • Author(s)
      Y.Hashimoto
    • Journal Title

      Proceedings (short papers) of 5th International Workshop on Security (IWSEC2010)

      Pages: 14-25

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] 合同部分群に関するlength spectrumの重複度について2010

    • Author(s)
      橋本康史
    • Journal Title

      2010年度表現論シンポジウム講演集

      Pages: 66-81

    • NAID

      130008004926

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Algorithms to solve massively under-defined systems of multivariate quadratic equations2010

    • Author(s)
      Y.Hashimoto
    • Journal Title

      Proceedings (Industrial Track) of the 8th International Conference on Applied Cryptography and Network Security

      Pages: 26-37

    • NAID

      10029802211

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Partial zeta functions2010

    • Author(s)
      Y.Hashimoto
    • Journal Title

      Archiv der Mathematik 95

      Pages: 363-372

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] On small secret key attack against RSA with high bits known prime factors2010

    • Author(s)
      Y.Hashimoto
    • Journal Title

      Proceedings (short papers) of 5th International Workshop on Security

      Pages: 14-25

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Partial zeta functions2010

    • Author(s)
      Y.Hashimoto
    • Journal Title

      Archiv der Mathematik

      Volume: 95 Pages: 363-372

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] On asymptotic behavior of composite integers n=qp2009

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      J. Math-for-Industry 1

      Pages: 45-49

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Prime and zero distributions for meromorphic Euler products2009

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      5th Asian Mathematical Conference Proceedings 1

      Pages: 255-261

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] On asymptotic behavior of composite integers n=pq2009

    • Author(s)
      Y.Hashimoto
    • Journal Title

      J.Math-for- Industry 1

      Pages: 45-49

    • NAID

      120001177117

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Prime and zero distributions for meromorphic Euler products2009

    • Author(s)
      Y.Hashimoto
    • Journal Title

      5th Asian Mathematical Conference Proceedings 1

      Pages: 255-261

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Distributions of multiplicities in length spectra for hyperbolic Riemann surfaces2008

    • Author(s)
      Yasufumi Hashimoto
    • Journal Title

      Complex Analysis and its Applications, OCAMI Studies 2

      Pages: 195-199

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Analytic properties of partial zeta functions2008

    • Author(s)
      Y.Hashimoto
    • Journal Title

      RIMS Kokyuroku Bessatsu B-7

      Pages: 73-82

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] 部分ゼータ関数の解析性2008

    • Author(s)
      橋本康史
    • Journal Title

      数理解析研究所講究録別冊 B-7

      Pages: 73-82

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Distributions of multiplicities in length spectra for hyperbolic Riemann surfaces2008

    • Author(s)
      Y.Hashimoto
    • Journal Title

      OCAMI Studies 2-2

      Pages: 195-199

    • Data Source
      KAKENHI-PROJECT-20740027
  • [Journal Article] Distributions of length multiplicities for Riemann surfaces

    • Author(s)
      Y.Hashimoto
    • Journal Title

      RIMS Kokyuroku Bessatsu

      Volume: (未定)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 有限体上の under-defined な多変数連立2次方程式の解法について2023

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会第19回研究部会連合発表会
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] 有限体上の under-defined な多変数連立2次方程式の解法について2023

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会第19回研究部会連合発表会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] 有限体上の under-defined な多変数連立2次方程式の解法について2023

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会第19回研究部会連合発表会
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] セルバーグゼータ関数に関する普遍性定理2023

    • Author(s)
      橋本康史
    • Organizer
      2023年度日本数学会年会代数学分科会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] On the spectral exponential sums for compact Riemann surfaces2023

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2023
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] 有限体上の under-defined な多変数連立2次方程式の解法について2023

    • Author(s)
      橋本康史
    • Organizer
      Crestクリプトマス 2023年度第2回全体会議
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] セルバーグゼータ関数に関する普遍性定理2023

    • Author(s)
      橋本康史
    • Organizer
      2023年度日本数学会年会代数学分科会
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] Universality of the Selberg zeta function2022

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2022
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] Simple matrix signature scheme の安全性について2022

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会第18回研究部会連合発表会
    • Data Source
      KAKENHI-PROJECT-22K03234
  • [Presentation] Universality of the Selberg zeta function2022

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2022
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Simple matrix signature scheme の安全性について2022

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会第18回研究部会連合発表会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] セルバーグゼータ関数の臨界領域における2乗積分について2021

    • Author(s)
      橋本康史
    • Organizer
      2021年度日本数学会秋季総合分科会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Solving the problem of Blockwise Isomorphism of Polynomials with Circulant matrice2021

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      16th International Workshop on Security (IWSEC2021)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Hufu-UOVの安全性について2021

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会年会第17回研究部会連合発表会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] モジュラー群に関するセルバーグゼータ関数の臨界領域での値について2020

    • Author(s)
      橋本康史
    • Organizer
      2020年度日本数学会秋季総合分科会代数学分科会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Diene-Thabet-Yusuf の3次多変数署名方式の安全性について2020

    • Author(s)
      橋本康史
    • Organizer
      2020年度日本応用数理学会年会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] An error term estimation of the prime geodesic theorem for the modular group2019

    • Author(s)
      Y. Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2019
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Recent developments in multivariate public key cryptosystems2019

    • Author(s)
      Y. Hashimoto
    • Organizer
      International Symposium on Mathematics, Quantum Theory, and Cryptography
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] A survey on multivariate public key cryptosystem2018

    • Author(s)
      橋本康史
    • Organizer
      代数的手法による数理暗号解析
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] A survey on Multivariate Public key Cryptosystem2018

    • Author(s)
      橋本康史
    • Organizer
      代数的手法による数理暗号解析
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 20172018

    • Author(s)
      Y. Hashimoto, Y. Ikematsu, T. Takagi
    • Organizer
      The 13th International Workshop on Security (IWSEC 2018)
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Circulant UOV/Rainbow の安全性について2018

    • Author(s)
      橋本康史
    • Organizer
      2018年度日本応用数理学会年会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] On multiplicities of eigenvalues of Laplacians on hyperbolic surfaces2018

    • Author(s)
      Y. Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2018
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] 多変数多項式暗号の暗号化の効率化2018

    • Author(s)
      橋本康史
    • Organizer
      2018年度暗号と情報セキュリティシンポジウム
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] Multiplicities in length spectra for congruence subgroups2017

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta functions and trace formulas in Fukuoka
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] 拡大体型多変数多項式暗号に対するランク攻撃2017

    • Author(s)
      橋本康史
    • Organizer
      CREST暗号数理 平成29年度第2回全体会議
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] 合同部分群に関するlength spectrum の重複度の分布について2017

    • Author(s)
      橋本康史
    • Organizer
      2017年度日本数学会年会函数解析学分科会 特別講演
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2017-03-24
    • Invited
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] Multiplicities in length spectra for non-compact arithmetic surfaces2017

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2017
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] HMFEv の安全性について2017

    • Author(s)
      橋本康史
    • Organizer
      日本応用数理学会2017年度年会
    • Data Source
      KAKENHI-PROJECT-17K05181
  • [Presentation] 多変数多項式暗号の暗号化速度の改良2017

    • Author(s)
      橋本康史
    • Organizer
      2017年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      ロワジールホテル那覇(沖縄県那覇市)
    • Year and Date
      2017-01-24
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] On values of Selberg's zeta functions for the modular group2016

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2016
    • Place of Presentation
      沖縄コンベンションセンター(沖縄県宜野湾市)
    • Year and Date
      2016-10-29
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] ZHFEに対する選択暗号文攻撃2016

    • Author(s)
      橋本康史
    • Organizer
      2016年度日本応用数理学会年会
    • Place of Presentation
      北九州国際会議場(福岡県北九州市)
    • Year and Date
      2016-09-12
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 多層なRainbowの安全性について2016

    • Author(s)
      橋本康史
    • Organizer
      2016年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      ANAクラウンプラザホテル熊本ニュースカイ
    • Year and Date
      2016-01-19
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 合同部分群に関するセルバーグゼータ関数の値の評価2016

    • Author(s)
      橋本康史
    • Organizer
      研究集会「表現論がつなぐ数学2016」
    • Place of Presentation
      沖縄県男女共同参画センター「てぃるる」(沖縄県那覇市)
    • Year and Date
      2016-09-09
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] On the security of ZHFE2016

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Fukuoka Workshop on Multivariate Cryptography
    • Place of Presentation
      九州大学
    • Year and Date
      2016-03-25
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 拡大体型の多変数連立2次方程式暗号の安全性について2015

    • Author(s)
      橋本康史
    • Organizer
      研究集会「表現論がつなぐ数学2015」
    • Place of Presentation
      JR九州ホテル鹿児島
    • Year and Date
      2015-09-17
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] Estimations of Selberg's zeta functions for congruence subgroups2015

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2015
    • Place of Presentation
      沖縄コンベンションセンター
    • Year and Date
      2015-10-10
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 多変数版HFEの安全性について2015

    • Author(s)
      橋本康史
    • Organizer
      2015年度日本応用数理学会年会
    • Place of Presentation
      金沢大学
    • Year and Date
      2015-09-09
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 素因子の上位ビットが既知で秘密鍵が小さいRSA に対する攻撃法について2014

    • Author(s)
      橋本康史
    • Organizer
      首都大整数論セミ ナー
    • Place of Presentation
      首都大東京
    • Year and Date
      2014-11-14
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 合同部分群に関するlength spectrumの重複度について2011

    • Author(s)
      橋本康史
    • Organizer
      2011年度日本数学会年会函数論分科会
    • Place of Presentation
      早稲田大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 多変数暗号に対する故障利用攻撃について2011

    • Author(s)
      橋本康史, 高木剛, 櫻井幸一
    • Organizer
      2011暗号と情報セキュリティシンポジウム
    • Place of Presentation
      福岡
    • Year and Date
      2011-01-27
    • Data Source
      KAKENHI-PROJECT-20300005
  • [Presentation] 多変数暗号に関する故障利用攻撃について2011

    • Author(s)
      橋本康史・高木剛
    • Organizer
      2011年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      福岡県北九州市
    • Year and Date
      2011-01-27
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 多変数暗号に関する故障利用攻撃について2011

    • Author(s)
      橋本康史, 高木剛
    • Organizer
      2011年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      リーガロイヤルホテル小倉(福岡県北九州市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] Algorithms to solve massively under-defined systems of multivariate quadratic equations2010

    • Author(s)
      Y.Hashimoto
    • Organizer
      Industrial Track in 8th International Conference on Applied Cryptography and Network Security
    • Place of Presentation
      北京工大建国飯店(中国北京市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] On multiplicities in length spectra for congruence subgroups2010

    • Author(s)
      Y.Hashimoto
    • Organizer
      Zetas and Limit Laws in OKINAWA 2010
    • Place of Presentation
      沖縄コンベンションセンター(沖縄県宜野湾市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] On small secret key attack against RSA with high bits known prime factors2010

    • Author(s)
      Y.Hashimoto
    • Organizer
      5th International Workshop on Security (IWSEC2010)
    • Place of Presentation
      神戸国際会議場(兵庫県神戸市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] Algorithms to solve massively under-defined systems of multivariate quadratic equations2010

    • Author(s)
      Y.Hashimoto
    • Organizer
      Industrial Track in 8th International Conference on Applied Cryptography and Network Security
    • Place of Presentation
      中国北京市
    • Year and Date
      2010-06-24
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 素因子の上位ビットが既知で秘密鍵が小さいRSA に対する攻撃法について2010

    • Author(s)
      橋本康史
    • Organizer
      2010年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      サンポートホール高松(香川県高松市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] On multiplicities in length spectra for congruence subgroups2010

    • Author(s)
      橋本康史
    • Organizer
      Zetas and Limit Laws in OKINAWA 2010
    • Place of Presentation
      沖縄県宜野湾市
    • Year and Date
      2010-11-06
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] On small secret key attack against RSA with high bits known prime factors2010

    • Author(s)
      Y.Hashimoto
    • Organizer
      5th International Workshop on Security (IWSEC2010)
    • Place of Presentation
      兵庫県神戸市
    • Year and Date
      2010-11-23
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数和に関する漸近公式2010

    • Author(s)
      橋本康史
    • Organizer
      大阪大学整数論・保型形式セミナー
    • Place of Presentation
      大阪大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数和に関する漸近公式2010

    • Author(s)
      橋本康史
    • Organizer
      第9回仙台広島整数論集会
    • Place of Presentation
      東北大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数和に関する漸近公式について2010

    • Author(s)
      橋本康史
    • Organizer
      2010年度日本数学会年会代数学分科会
    • Place of Presentation
      慶應義塾大学
    • Year and Date
      2010-03-26
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 合同部分群に関するlengthspectrumの重複度について2010

    • Author(s)
      橋本康史
    • Organizer
      2010年度表現論シンポジウム
    • Place of Presentation
      おおとり荘(静岡県伊豆の国市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 素因子の上位ビットが既知で秘密鍵が小さいRSAに対する攻撃法について2010

    • Author(s)
      橋本康史
    • Organizer
      2010年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      香川県高松市
    • Year and Date
      2010-01-19
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数和に関する漸近公式2010

    • Author(s)
      橋本康史
    • Organizer
      研究集会「表現論がつなぐ数論・解析学・組合せ論」
    • Place of Presentation
      愛媛大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 合同部分群に関するlength spectrumの重複度について2010

    • Author(s)
      橋本康史
    • Organizer
      2010年度表現論シンポジウム
    • Place of Presentation
      静岡県伊豆の国市
    • Year and Date
      2010-11-10
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数和に関する漸近公式について2010

    • Author(s)
      橋本康史
    • Organizer
      第15回代数学若手研究会
    • Place of Presentation
      名古屋大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数和に関する漸近公式について2010

    • Author(s)
      橋本康史
    • Organizer
      2010年度日本数学会年会代数学分科会
    • Place of Presentation
      慶応義塾大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 変数の個数が方程式の個数よりも十分大きい多変数連立二次方程式の解法について2009

    • Author(s)
      橋本康史
    • Organizer
      2009年度暗号と情報セキュリティシンポジウム
    • Place of Presentation
      大津プリンスホテル(滋賀県大津市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] Asymptotic formulas of class number sums in arithmetic progressions for indefinite binary quadratic forms2009

    • Author(s)
      Y.Hashimoto
    • Organizer
      Zetas and Limit Laws in OKINAWA 2009
    • Place of Presentation
      フェストーネ(沖縄県宜野湾市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] Asymptotic formulas of class number sums in arithmetic progressions for indefinite binary quadratic forms2009

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zetas and Limit Laws in OH-NAWA 2009
    • Place of Presentation
      沖縄県宜野湾市
    • Year and Date
      2009-11-15
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 変数の個数が方程式の個数よりも十分大きい多変数連立二次方程式の解法について2009

    • Author(s)
      橋本康史
    • Organizer
      ワークショップ「安全な社会基盤への計算量的数論の応用-次世代暗号技術の最先端理論より-
    • Place of Presentation
      九州大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] Prime and zero distributions for meromorphic Euler products2009

    • Author(s)
      Y.Hashimoto
    • Organizer
      5th Asian Mathematical Conference
    • Place of Presentation
      Putra World Trade Centre(マレーシア,クアラルンプール市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] Prime and zero distributions for meromorphic Euler products2009

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      5th Asian Mathematical Conference
    • Place of Presentation
      マレーシア・クアラルンプール市
    • Year and Date
      2009-06-25
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] オイラー積で表される有理型なゼータ関数の素元分布と零点分布について2009

    • Author(s)
      橋本康史
    • Organizer
      研究集会「表現論がつなぐ数学」
    • Place of Presentation
      ホテルロコアナハ(沖縄県那覇市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数の部分和に関する漸近公式について2009

    • Author(s)
      橋本康史
    • Organizer
      2008年度日本数学会代数学分科会
    • Place of Presentation
      東京工業大学(東京都目黒区)
    • Year and Date
      2009-09-27
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] 不定値二元二次形式の類数の部分和に関する漸近公式について2008

    • Author(s)
      橋本康史
    • Organizer
      2008年度日本数学会年会代数学分科会
    • Place of Presentation
      東京工業大学
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] n=pq型の合成数の分布について2008

    • Author(s)
      橋本康史
    • Organizer
      Zetas and Limit Laws in OKINAWA 2008
    • Place of Presentation
      沖縄コンベンションセンター(沖縄県宜野湾市)
    • Data Source
      KAKENHI-PROJECT-20740027
  • [Presentation] A polynomial-time algorithm for solving a class of underdetermined multivariate quadratic equations over fields of odd characteristics

    • Author(s)
      C.M. Cheng, Y. Hashimoto, H. Miura, T. Takagi
    • Organizer
      Sixth International Conference on Post-Quantum Cryptography
    • Place of Presentation
      Waterloo University
    • Year and Date
      2014-10-01 – 2014-10-03
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] Cryptanalysis of the multivariate sigature scheme proposed in PQCrypto 201

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Sixth International Conference on Post-Quantum Cryptography
    • Place of Presentation
      Waterloo University
    • Year and Date
      2014-10-01 – 2014-10-03
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] 合同部分群に関するlength spectrum の重複度について

    • Author(s)
      橋本康史
    • Organizer
      RIMS 研究集会「解析的整数論― 数 論的対象の分布と近似」
    • Place of Presentation
      京都大学
    • Year and Date
      2014-10-29 – 2014-10-31
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] On the values of Selberg’s zeta functions for congruence subgroups

    • Author(s)
      Yasufumi Hashimoto
    • Organizer
      Zeta Functions in OKINAWA 2014
    • Place of Presentation
      沖縄コンベンションセンター
    • Year and Date
      2014-10-25 – 2014-10-28
    • Data Source
      KAKENHI-PROJECT-26800020
  • [Presentation] Pell 型の方程式t^2 -Du^2 = 4N が可解な判別式に関する類数和について

    • Author(s)
      橋本康史
    • Organizer
      研究集会「2014 表 現論がつなぐ数学」
    • Place of Presentation
      サンポートホール高松
    • Year and Date
      2014-09-28 – 2014-09-29
    • Data Source
      KAKENHI-PROJECT-26800020
  • 1.  SAKURAI Kouichi (60264066)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 1 results
  • 2.  HORI Yoshiaki (90264126)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 3.  TAKAHASHI Kenichi (30399670)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 4.  NISHIDE Takashi (70570985)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 5.  ARARAGI Tadashi (00396136)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 6.  SU Chunhua
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 7.  CHENG Mou-chen
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 8.  CHENG Chen-Mou
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results
  • 9.  高木 剛
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 1 results

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