Authentication system and authentication device

An authentication system that executes user authentication processing in accordance with an authentication request, comprising:

• at least one first device that is configured to acquire biological information of a user, the first device having a biological information acquiring unit that is configured to acquire the biological information of the user;
• and
• a second device that is configured to communicate with the first device, the second device having:
• a first authentication unit that is configured to output an authentication result of user authentication, as an authentication for the user to use the first device, based on the biological information acquired by the first device,
• an information acquiring-storing unit that is able to store identification information of the first device beforehand,
• a determination unit that is configured to determine whether the first device is registered, based on identification information received from the first device and the identification information in the information acquiring-storing unit, and
• a second authentication unit that is configured to perform user authentication, as an authentication for the user to use the second device, in accordance with the authentication result output by the first authentication unit, when the determination unit determines that the first device is registered.

An authentication device that communicates with a biological authentication device which performs authentication based on biological information of a user and that authenticates the user with a host device, comprising:

• an information acquiring-storing unit configured to be able to store identification information of the biological authentication device;
• a determination unit that is configured to determine whether the biological authentication device is registered, based on information indicating identification information received from the biological authentication device and the identification information in the information acquiring-storing unit;
• and
• an authentication unit that is configured to perform user authentication in accordance with an authentication result received from the biological authentication device, when the determination unit determines that the biological authentication device is registered, the user authentication being an authentication for the user to use the host device.