Authentication system, control method thereof, service provision device, and storage medium

A control method for an authentication system that includes a service provision device that provides a service and an authorization service device that manages authorization information used for providing the service by the service provision device without requiring authentication information, comprising:

• registering, with the service provision device, the identification information for an information processing device that cooperates with the authentication system;
• associating the identification information for the information processing device with authorization information in accordance with an issuance of the authorization information corresponding to the information processing device, and saving them in the authorization service device;
• querying, the authorization service device, for the identification information for the information processing device associated with the authorization information in response to a request for obtaining the service and the issued authorization information from the information processing device;
• and
• providing, according to the request, the service with the information processing device in response to a correspondence between the identification information for the information processing device acquired as a result of the querying and the identification information for the registered information processing device.

A service provision device that is communicable with an authorization service device that manages authorization information used for providing the service by the service provision device without requiring authentication information, comprising:

• a registering unit configured to register the identification information for the information processing device that cooperates with the service provision device;
• a querying unit configured to query, the authorization service device, for the identification information for the information processing device associated with the authorization information in response to an acquisition of the request for obtaining the service and the issued authorization information form;
• and
• a providing unit configured to provide, according to the request, the service with the information processing device according to the request in response to a correspondence between the identification information for the information processing device acquired as a result of the querying and the identification information for the registered information processing device.

A non-transitory storage medium on which is stored a computer program for making a computer execute a control method of an authentication system that includes a service provision device that provides a service and an authorization service device that manages authorization information used for providing the service by the service provision device without requiring authentication information, comprising:

• registering, with the service provision device, the identification information for an information processing device that cooperates with the authentication system;
• associating the identification information for the information processing device with authorization information in accordance with an issuance of the authorization information corresponding to the information processing device, and saving them in the authorization service device;
• querying, the authorization service device, for the identification information for the information processing device associated with the authorization information in response to a request for obtaining the service and the issued authorization information from the information processing device;
• and
• providing, according to the request, the service with the information processing device in response to a correspondence between the identification information for the information processing device acquired as a result of the querying and the identification information for the registered information processing device.