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Okumura Shinya

奥村 伸也

Graduate School of Engineering Division of Electrical, Electronic and Information Engineering, Assistant Professor

Education

  • 2012/04 - 2015/03, Kyushu University, Graduate School of Mathematics, 数理学専攻 博士課程
  • 2010/04 - 2012/03, Kyusyu University, 大学院数理学府 数理学専攻 修士課程
  • 2008/04 - 2010/03, Kyushu University, 理学部 数学科 (3年次編入)

Research History

  • 2018/04/01 - Present, Osaka University Graduate School of Engineering Division of Electrical, Electronic and Information Engineering, Assistant Professor
  • 2017/02/01 - 2018/03/31, Osaka University Graduate School of Engineering Division of Electrical, Electronic and Information Engineering, Assistant Professor
  • 2016/05 - 2017/01, 公益財団法人九州先端科学技術研究所情報セキュリティ研究室・研究員
  • 2015/04 - 2016/04, 九州大学マス・フォア・インダストリ研究所・学術研究員

Research Areas

  • Informatics, Information security
  • Natural sciences, Algebra

Professional Memberships

  • 情報処理学会
  • 日本応用数理学会
  • 日本数学会

Papers

  • An Improved Security Analysis on an Indeterminate Equation Public Key Cryptosystem by Evaluation Attacks, Akifumi Muroi,Shinya Okumura,Atsuko Miyaji, Lecture Notes in Computer Science, Vol. 11959, p. 421-436, 2019/09
  • An Experimental Analysis on Lattice Attacks against Ring-LWE over Decomposition Fields, Shota Terada,Hideto Nakano,Shinya Okumura,Atsuko Miyaji, 2018 International Symposium on Information Theory and Its Applications (ISITA), IEEE, IEEE, p. 306-310, 2018/10
  • Cryptanalysis of a public key cryptosystem based on Diophantine equations via weighted LLL reduction, Jintai Ding,Momonari Kudo,Shinya Okumura,Tsuyoshi Takagi,Chengdong Tao, Japan Journal of Industrial and Applied Mathematics, 2018/06
  • Security analysis of cryptosystems using short generators over ideal lattices, Shinya Okumura,Shingo Sugiyama,Masaya Yasuda,Tsuyoshi Takagi, Japan Journal of Industrial and Applied Mathematics, Springer Japan, 2018/05
  • A Publickey Encryption Scheme Based on Non-linear Indeterminate Equations, Koichiro Akiyama,Yasuhiro Goto,Shinya Okumura,Tsuyoshi Takagi,Koji Nuida,Goichiro Hanaoka, Lecture Notes in Computer Science, Springer, Cham, Vol. 10719, p. 215-234, 2017/12
  • An Estimate of the Complexity of the Section Finding Problem on Algebraic Surfaces, Shinya Okumura,Koichiro Akiyama,Tsuyoshi Takagi, 2016 FOURTH INTERNATIONAL SYMPOSIUM ON COMPUTING AND NETWORKING (CANDAR), IEEE, p. 28-36, 2016
  • Cryptanalysis of a Public Key Cryptosystem Based on Diophantine Equations via Weighted LLL Reduction (Short Paper), Jintai Ding,Momonari Kudo,Shinya Okumura,Tsuyoshi Takagi,Chengdong Tao, Lecture Notes in Computer Science, Springer International Publishing, Vol. 9836, p. 305-315, 2016
  • A public key cryptosystem based on diophantine equations of degree increasing type, Shinya Okumura, Pacific Journal of Mathematics for Industry, Vol. 7, No. 4, 2015/06
  • On the number of Fp-valued points of elliptic curves, Shinya Okumura, Journal of Math-for-Industry, Vol. 5, p. 111-128, 2013/07

Awards

  • 日本応用数理学会 2016年度若手優秀講演賞, 奥村 伸也, 日本応用数理学会, 2017/06
  • 電子情報通信学会基礎・境界ソサイエティ 2016年度 情報セキュリティ研究奨励賞, 奥村 伸也, 電子情報通信学会, 2017/01
  • CANDAR 2016, Outstanding Paper Award, Shinya Okumura, Koichiro Akiyama, Tsuyoshi Takagi, Organizing Committee of CANDAR 2016, 2016/11

Academic Activities

  • The 22nd Workshop on Elliptic Curve Cryptography (ECC 2018), Akira Otsuka (General Chair), 2018/11 -
  • The 15th InternationaConference on Applied Cryptography and Network Security (ACNS2017), Hiroaki Kikuchi (General Chair), 2017/07 -