Chikashi Okamoto

Database integration management method and apparatus and processing program, medium therefor

Method of checking authenticity of sheet with built-in electronic circuit chip

Identification code management method and management system

Service providing system and method

Control system and method of controlling information written into storage media

Service providing system and authentication system, as well as signature generating apparatus, service utilizing apparatus and verification apparatus

Terminal for use in a system interfacing with storage media

Electronic device and communication method using bridging medium

Method of controlling information written into storage media

Apparatus and system for recording and reproducing contents