Information processing device, authentication system, and information processing method

An information processing device requiring an account ID for at least some uses, the information processing device comprising:

• a device communication interface connectable to an authentication server across a network;
• a local storage unit storing an account ID list listing card IDs in association with account IDs previously authenticated as valid by the authentication server;
• and
• a processor configured to:
• receive a card ID from a card reader associated with the information processing device;
• compare the card ID to the account ID list in the local storage unit;
• permit use of the information processing device when the card ID corresponds to an account ID on the account ID list;
• transmit the card ID to the authentication server for validation when the card ID does not correspond to any account ID on the account ID list;
• permit use of the information processing device when the card ID is validated by the authentication server, and add the card ID to the account ID list in association with validated account ID;
• and
• request an updated account ID list from the authentication server and store the updated account ID list in the local storage unit as the account ID list.

A non-transitory, computer-readable storage medium storing program instructions which when executed by a processor of an information processing device in an authentication system causes the information processing device to perform a method comprising:

• receive a card ID from a card reader associated with the information processing device;
• compare the card ID to an account ID list stored in a local storage unit;
• permit use of the information processing device when the card ID corresponds to an account ID on the account ID list;
• transmit the card ID to the authentication server for validation when the card ID does not correspond to any account ID on the account ID list;
• permit use of the information processing device when the card ID is validated by an authentication server, and add the card ID to the account ID list in association with validated account ID;
• and
• request an updated account ID list from the authentication server and store the updated account ID list in the local storage unit as the account ID list.