COMMON ID MANAGEMENT SYSTEM, SERVICE PROVISION SYSTEM, SECURITY LEVEL UPDATE SYSTEM, AND COMMON ID MANAGEMENT METHOD

摘要

PROBLEM TO BE SOLVED: To improve both safety and convenience of service provided via a network.SOLUTION: A personal identification system 1 secures a high guarantee level by making only a personal information management device 40 hold and manage a user's personal information prepared based on the user's public certificate, and making it complement a service provision device 20 and a common ID managing device 30 when confirming a personal identification for issuance of a common ID and provision of services to the user. Thereby, service can be highly safely provided to the user via the Internet, without impairing the convenience of the Internet.