Koji Nuida

Personal Information

Koji Nuida
Koji Niida

Department of Mathematical Informatics, 
Graduate School of Information Science and Technology
Professor

Room 354,Engineering Building 6, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656 
Tel: 03-5841-6959 (ext. 26959)
Fax:

E-mail:nuida@mist.i.u-tokyo.ac.jp

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Biography

March 2001 Bachelor (Science) Department of Mathematics, Faculty of Science, The University of Tokyo, Japan
March 2003 M.S. (Mathematical Sciences) Graduate School of Mathematical Sciences, The University of Tokyo, Japan
March 2006 Ph.D. (Mathematical Sciences) Graduate School of Mathematical Sciences, The University of Tokyo, Japan
April 2006 National Institute of Advanced Industrial Science and Technology, post-doc researcher, Japan
April 2007 National Institute of Advanced Industrial Science and Technology, researcher
March 2013 National Institute of Advanced Industrial Science and Technology, senior researcher, Japan
October 2014 Japan Science and Technology Agency, PRESTO (additional; until March 2018)
April 2018 Associate Professor, Graduate School of Information Science and Technology, The University of Tokyo, Japan

Research Themes

The main subjects of my research are cryptography and information security technologies that are bases of security for various information technologies. Examples are as follows:

● Theory of cryptography
Designs and security analyses for cryptographic schemes, particularly aiming at realizing long-term security against future adversaries with highly advanced computational powers.

● Privacy-preserving data mining
Secure computation schemes that enable to utilize data while preserving the security/privacy, in various application areas.

● Fundamental mathematics
Mathematical theory including group theory and discrete mathematics, and their application to cryptography.

Main paper and books

Koji Nuida, Goichiro Hanaoka, "On the security of pseudorandomized information-theoretically secure schemes", IEEE Transactions on Information Theory, vol.59, no.1, pp.635-652, 2013.
Koji Nuida, Kaoru Kurosawa, "(Batch) Fully Homomorphic Encryption over Integers for Non-Binary Message Spaces", in: EUROCRYPT 2015 (Part I), LNCS vol.9056, pp.537-555, 2015.
Kana Shimizu, Koji Nuida, Gunnar Ratsch, "Efficient Privacy-Preserving String Search and an Application in Genomics", Bioinformatics, vol.32, no.11, pp.1652-1661, 2016.
Robert B. Howlett, Bernhard Muhlherr, Koji Nuida, "Intrinsic Reflections and Strongly Rigid Coxeter Groups", Proceedings of the London Mathematical Society, vol.116, no.3, pp.534-574, 2018.

 

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