Patent ID: 6799271
Filing Date: 2004-09-28
Classification: G06F,G06Q

Abstract:
A service providing method which uses a user terminal which stores a decryption key, a service providing apparatus which can communicate with the user terminal, and an authentication apparatus which can communicate with the service providing apparatus, comprising:an authentication data generation step of generating authentication data and encrypting the generated authentication data using an encryption key; a first transmission step of transmitting the encrypted authentication data from the authentication apparatus to the user terminal through the service providing apparatus; a decryption step of decrypting the encrypted authentication data in the user terminal using the decryption key stored in the user terminal; a return step of returning the authentication data decrypted in said decryption step to the authentication apparatus through the service providing apparatus; an authentication step of authenticating the decrypted authentication data in the authentication apparatus by comparing the decrypted authentication data transmitted from the user terminal and returned in said return step with the authentication data generated in said authentication data generation step before encryption; a second transmission step of transmitting usage right information, which prescribes a use condition of a service, from the authentication apparatus to the service providing apparatus if the authentication step authenticates the decrypted authentication data; and a service providing step of causing the service providing apparatus to provide the service to the user in accordance with the condition prescribed in the usage right information.