AUTHENTICATION SYSTEM, AUTHENTICATION METHOD, PROGRAM AND COMMUNICATION SYSTEM

摘要

An authentication system includes a storage unit that stores a service expiration date of a service provided by a client; a reception unit that receives from the client a request to issue an access token used to authorize use of the service; an issuing unit that issues, in response to the reception of the request, the access token based on the service expiration date to the client; and a determining unit that, in response to the issued access token transmitted by the client, determines that the access token is valid if the current date and time does not exceed the service expiration date of the service, or determines that the access token is not valid if the current date and time exceeds the service expiration date.

主权项

1. An authentication system comprising:
a storage unit that stores a service expiration date of a service provided by a client; a reception unit that receives from the client a request to issue an access token used to authorize use of the service; an issuing unit that issues, in response to the reception of the request, the access token based on the service expiration date to the client; and a determining unit that, in response to the issued access token transmitted by the client, determines that the access token is valid if the current date and time does not exceed the service expiration date of the service, or determines that the access token is not valid if the current date and time exceeds the service expiration date.