Patent ID: 8341703

Claim:
An authentication coordination system, comprising: a server apparatus for providing a service to a plurality of terminal apparatuses; a first terminal apparatus using a service provided by the server apparatus; and a second terminal apparatus using a service provided by the server apparatus, wherein the server apparatus, the first terminal apparatus, and the second terminal apparatus are communicably coupled to each other, wherein the server apparatus comprises: a server apparatus control unit for requesting an authentication of a user of the first terminal apparatus to the first terminal apparatus, when the first terminal apparatus requests a use of a service, conducting the authentication of the user based on authentication information received from the first terminal apparatus for proving the user to be authentic, and generating authenticated information indicating that the authentication of the user has been successfully completed; and a server apparatus storage unit for storing therein the authenticated information, wherein the first terminal apparatus comprises: a first terminal apparatus control unit for generating authenticated information indicating that the authentication of the user has been successfully completed or obtaining the authenticated information from the server apparatus, and transmitting the authenticated information to the second terminal apparatus when the second terminal apparatus requests a transfer of the authenticated information; and a first terminal apparatus storage unit for storing therein the authenticated information, and wherein the second terminal apparatus comprises: a second terminal apparatus control unit for requesting the transfer of the authenticated information, to the first terminal apparatus, and requesting a use of the service to the server apparatus using the authenticated information received from the first terminal apparatus; and a second terminal apparatus storage unit for storing therein the authenticated information wherein the first terminal apparatus deletes the authenticated information after having transferred the authenticated information to the second terminal apparatus, and wherein the second terminal apparatus does not perform an authentication processing with the server apparatus after having been transferred the authenticated information by the first terminal apparatus.