ホーム‎ > ‎

English

Yasuhiko Ikematsu


Affiliation
Department of Mathematical Informatics, The University of Tokyo
7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
E-mail ikematsu(at)mist.i.u-tokyo.ac.jp

Research Interests

  • Post Quantum Cryptography
  • Multivariate Cryptography
  • Automorphic Forms and Representations

Education

Admitted to Fuculty of Mathematics, Kyushu University, 2004
B.S. degree, Kyushu University, 2008
M.S. degree, Kyushu University, 2010
Doctor of Mathematical Science degree, Kyushu University, 2016

    Title: Local theta lifts for p-adic unitary dual pairs U(2)×U(1),U(2)×U(3) and a p-adic quaternionic dual pair U(1)×U(1).
    abstract: In this paper we describe the local theta lift for p-adic unitary dual pairs U(2)×U(1) and U(2)×U(3).
          Also we describe the local theta lift for a p-adic quaternionic unitary dual pair U(1)×U(1).

Business Experience

October 2010-March 2012, Research Assistant

April 2016-June 2016, Postdoctoral Researcher

July 2016-March 2018, Post-doctoral Researcher (CREST, JST), (Institute of Mathematics for Industry, Kyushu University)

April 2018-present, Project Researcher (CREST, JST), (Department of Mathematical Informatics, The University of Tokyo),
            (Superviser : Tsuyoshi Takagi) https://cryptomath-crest.jp/about/takagi.html
Journal papers/Rreferred conference papers

  1. Yasufumi Hashimoto, Yasuhiko Ikematsu, Tsuyoshi Takagi, "Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 2017", IWSEC 2018, to appear. (IWSEC 2018 Best Paper Award)

  2. Yasuhiko Ikematsu, Koichiro Akiyama, Tsuyoshi Takagi, "An Improvement on the Linear Algebraic Attack for the Indeterminate Equation Encryption Scheme", ISITA2018, to appear.

  3. Yacheng Wang, Yasuhiko Ikematsu, Dung Hoang Duong, Tsuyoshi Takagi, "Efficient Decryption Algorithms for Extension Field Cancellation Type Encryption Schemes", ACISP 2018, to appear.

  4. Yasuhiko Ikematsu, "Local theta lift for p-adic unitary dual pairs U(2)×U(1) and U(2)×U(3)", to appear in Kyoto Journal of Mathematics.

  5. Yasuhiko Ikematsu, Dung H. Duong, Albrecht Petzoldt, Tsuyoshi Takagi, "An Efficient Key Generation of ZHFE Public Key Cryptosystem", IEICE Transaxtion on Fundamentals of Electronics, Communications and Computer Sciences (Special Section on Cryptography and Information Security), Vol.E101-A, No.1, January 2018, pp.29-38.

  6. Yasuhiko Ikematsu, Ray Perlner, Daniel Smith-Tone, Tsuyoshi Takagi, Jeremy Vates, "HFERP - A New Multivariate Encryption Scheme", PQCrypto 2018, LNCS 10786, pp.396-416,2018.

  7. Yasuhiko Ikematsu, Dung H. Duong, Albrecht Petzoldt, Tsuyoshi Takagi, "Revisiting the Efficient Key Generation of ZHFE", C2SI 2017, LNCS 10194, pp.195-212, Springer 2017.

Unreferred papers and preprints

  1. Yasufumi Hashimoto, Yasuhiko Ikematsu, Tsuyoshi Takagi, "Chosen Message Attack on Multivariate Signature ELSA at Asiacrypt 2017", IACR ePrint 2018/310
  2. Koichiro Akiyama, Yasuhiro Goto, Shinya Okumura, Tsuyoshi Takagi, Koji Nuida, Goichiro Hanaoka, Hideo Shimizu, Yasuhiko Ikematsu, "A Public-key Encryption Scheme Based on Non-linear Indeterminate Equations (Giophantus)", IACR ePrint 2017/1241
  3. Yasuhiko Ikematsu, Dung H. Duong,Albrecht Petzoldt, Tsuyoshi Takagi, "Revisiting the Efficient Key Generation of ZHFE", IACR ePrint 2016/1065.
Report
  1. Yasuhiko Ikematsu, "Local theta lift for U(2)×U(3)", RIMS Workshop, Automorphic Forms, Automorphic L-functions and Related Topics, report, (2016)
Presentations
  1. Yasuhiko Ikematsu, "The description of local theta lift for U(2)×U(3)", The 16th Korea-Japan Workshop on Algebra and Combinatorics, 2018.2.9.
  2. Yasuhiko Ikematsu, "Revisiting the Efficient Key Generation of ZHFE", "Codes, Cryptology and Information Security" Second International Conference (C2SI), Morocco, 2017.4.11.
  3. Yasuhiko Ikematsu, "Revisiting the Efficient Key Generation of ZHFE", The Ninth Workshop among Asia Information Security Labs (WAIS2017), Sage University, 2017.1.21.
  4. Yasuhiko Ikematsu, "Local theta lift for U(2)×U(3)", Kyushu university algebra seminar, 2016.7.29.
  5. Yasuhiko Ikematsu, "Local theta lift for U(2)×U(3)", RIMS Workshop, Automorphic Forms, Automorphic L-functions and Related Topics, 2016.2.4.

Last up date: May 18. 2018.
Comments