He received the M.E. and D.E. degrees in computer science from Osaka University, Japan, in 1988 and 1991, respectively. From 1990 to 1992, he was an Assistant Professor in Education Center for Information Processing, Osaka University. From 1992 to 1993, he was with Information Technology Center, Nara Institute of Science and Technology (NAIST), Japan, as an Associate Professor. Since 1993, he has been with Graduate School of Information Science, NAIST, where he is now a Professor. Since April 2004, he has been an Advisor on Information Security, at Cabinet Secretariat, Government of Japan. His research interests include technologies for information sharing, multimedia communication over high speed communication channels, network security and network management for the Internet.
