A device includes a first memory area being used to store a first key and unique secret identification information, the first memory area being restricted from being read and written from outside; a second memory area being used to store encrypted secret identification information generated by encrypting the secret identification information, the second memory area being allowed to be read-only from outside; a third memory area being readable and writable from outside; a first data generator configured to generate a second key by using the first key; a second data generator configured to generate a session key by using the second key; and a one-way function processor configured to generate an authentication information by processing the secret identification information with the session key in one-way function operation, wherein the encrypted secret identification information and the authentication information are output to outside.