Lectures in charge

• Cryptographic Protocol
• Programming
• Research Guidance
• Information Security Exercise for PhD Students
• Special Studies in Information Security

Course

Mathematical Science Course, System Design Course

Profile

He received the B.S. degree in mathematics from Okayama University in 1988, the M.I.S. degree in information science from JAIST in 1994, and the D.S. degree from Okayama University in 2000, respectively. He joined Hitachi Software Engineering Co., Ltd. from 1988 to 1996, and Research and Development Initiative of Chuo University from 2000. He is currently a professor of Graduate School of Information Security, Institute of Information Security.

Research Achievement

1. ({1,3},n) hierarchical secret sharing scheme based on XOR operations for a small number of indispensable participants, K. Shima, H. Doi, Proc. of AsiaJCIS 2016,pp.108-114 (2016).
2. A Fully Secure Spatial Encryption Scheme, D. Moriyama, H. Doi, IEICETrans. Fundamentals, Vol.E94-A, No.1, pp.28-35 (2011).
3. Secure and Efficient IBE-PKE Proxy Re-Encryption, T. Mizuno, H. Doi,IEICE Trans. Fundamentals, Vol.E94-A, No.1, pp.36-44 (2011).
4. Research of Privacy-enhanced Content Distribution and Charging Scheme, T. Tobita, H. Yamamoto, H. Doi, K. Majima, IPSJ Journal, Vol.50, No.9, pp.2228-2242 (2009). [in Japanese]

Research Themes

His research interests include information security and cryptography. Especially his recent research topics are

• (1) Privacy enhancing technology and its applicaitions,
• (2) Provable security of public-key cryptosystems.