Patent ID: 8239684
Filing Date: 2012-08-07
Classification: H04L

Abstract:
1. A software IC card system comprising a terminal, a service providing server for providing a service to the terminal, and a management server for managing software for providing the service, said software IC card system characterized in that: said terminal provides a first electronic signature to user information which enables a user to be identified, and transmits the user information appended with the first electronic signature to said management server, said management server calculates a hash value for the software, provides a second electronic signature to the software, generates a first software area from the software, which has been provided with the second electronic signature, provides a third electronic signature to the user information provided with the first electronic signature, to the hash value and to user management information for managing the user, generates a second software area from: (a) the user information provided with the third electronic signature and the first electronic signature, (b) the hash value, and (c) the user management information, encrypts the second software area using a key common to said management server and said service providing server, combines the first software area and the encrypted second software area to create a software IC card, encrypts the created software IC card using a public key of said terminal, and transmits the software IC card to said terminal.