Method and system for issuing service and method and system for providing service

摘要

According to the present invention, a service issuing system 1110 comprises identification number issuing means 1120 for issuing an identification number 1130 required to receive a service in accordance with an application from a user system 1210, encryption means 1150 for encrypting the identification number 1130 and generating encrypted data 1160 by a private key 1140 corresponding to a public key owned by a service provider, and encryption means 1170 for encrypting the encrypted data 1160 and generating encrypted data 1180 by an encryption key 1240 corresponding to a decryption key owned by the user system 1210.