Dr. Kouya Tochikubo, Professor

Affiliation

Department of Mathematical Information Engineering, College of Industrial Technology, Nihon University

1-2-1, Izumi-cho, Narashino-shi, Chiba 275-8575, JAPAN
E-mail: tochikubo.kouyanihon-u.ac.jp

Biography

• B.S. degree from Tokyo University of Science, 1996
• M.S. degree from Japan Advanced Institute of Science and Technology (JAIST), 1998
• Dr.Eng. degree from Tokyo Institute of Technology, 2004
• Research engineer at Toshiba Corporation, 1998-2006
• Lecturer at Nihon University, 2006-2011
• Associate Professor at Nihon University, 2011-2020
• Visiting Professor at University of Waterloo, 2012-2013
• Professor at Nihon University, 2020-

Research Interests

Information Theory, Information Security

Awards

• SCIS Paper Award, 2002
• IEICE Best Paper Award, 2005

Publications

• K. Tochikubo, ``General secret sharing schemes using hierarchical threshold scheme,''
  IEICE Trans. Fundamentals, vol. E102-A, No.09, pp.1037-1047 (2019)
• K. Tochikubo, ``Improvement of general secret sharing scheme reducing shares distributed to specified participants,''
  IEICE Trans. Fundamentals, vol. E102-A, No.06, pp.808-817 (2019)
• U. Itoh and K. Tochikubo, ``Recursive general secret sharing scheme based on authorized subsets,''
  International Journal of Machine Learning and Computing (IJMLC), Vol. 9, No. 1, pp.75-82 (2019)
• K. Tochikubo, ``New general secret sharing scheme based on unauthorized subsets: improvement of information rates for specified participants,''
  Journal of Information Processing, vol. 24, No.5, pp.772-780 (2016)
• K. Tochikubo, ``New secret sharing schemes realizing general access structures,''
  Journal of Information Processing, vol. 23, No.5, pp.570-578 (2015)
• K. Kakuda, K. Tochikubo and J. Toyotani, ``Dam-breaking flow simulations by particle-based scheme using logarithmic weighting function,'' CMES, 95/ 5, 351-367 (2013)
• K. Tochikubo, ``New construction methods of secret sharing schemes based on authorized subsets,''
  Journal of Information Processing, vol. 21, No.4, pp.590-598 (2013)
• K. Tochikubo, ``Efficient secret sharing schemes based on unauthorized subsets,''
  IEICE Trans. Fundamentals, vol. E91-A, No.10, pp.2860-2867 (2008)
• K. Tochikubo, T. Uyematsu and R. Matsumoto, ``Efficient secret sharing schemes based on authorized subsets,''
  IEICE Trans. Fundamentals, vol. E88-A, no.1, pp.322-326 (2005)
• K. Tochikubo, ``Efficient secret sharing schemes realizing general access structures,''
  IEICE Trans. Fundamentals, vol. E87-A, no.7, pp. 1788-1797 (2004)
• K. Tochikubo, T. Uyematsu and R. Matsumoto, ``Secret key capacity for ergodic correlated sources,''
  IEICE Trans. Fundamentals, vol. E87-A, no.6, pp. 1651-1654 (2004)
• K. Tochikubo, K. Okada, N. Endoh and E. Okamoto, ``Renewable authentication and encryption systems,''
  Jornal of Information Processing of Japan, Vol.41，no.8，pp.2121-2128, 2000 (in Japanese)
• New general secret sharing scheme using hierarchical threshold scheme: improvement of information rates for specified participants (K. Tochikubo)
  6th International Conference on Information Systems Security and Privacy (ICISSP 2020) (2020)
• Recursive general secret sharing scheme based on authorized subsets(U. Itoh and K. Tochikubo)
  7th International Conference on Information and Electronics Engineering (ICIEE 2018) (2018)
• Multiple assignment secret sharing scheme using hierarchical threshold scheme (K. Tochikubo)
  The 12th International Conference for Internet Technology and Secured Transactions (ICITST-2017) (2017)
• Improvement of information rates for specified participants in general secret sharing schemes (K. Tochikubo)
  14th International Conference on Privacy, Security and Trust (PST2016) (2016)
• A construction method of secret sharing schemes based on authorized subsets (K. Tochikubo)
  2008 International Symposium on Information Theory and its Application (ISITA2008) (2008)
• Efficient Multiple Assignment Secret Sharing Schemes (K.Tochikubo)
  2007 IEEE International Symposium on Information Theory (ISIT2007), pp. 461-465 (2007)
• Secret key capacity for ergodic correlated sources (K.Tochikubo, T. Uyematsu and R. Matsumoto)
  The Eighth Canadian Workshop on Information Theory(CWIT 2003), pp. 8-11 (2003)
• Error exponations for identification codes under average error criterion (K. Tochikubo, T. Uyematsu and E. Okamoto)
  1998 International Symposium on Information Theory and its Application (ISITA98), pp.72-75 (1998)