| 摘要 |
This authentication device outputs a first authentication request together with a first challenge value corresponding to a random number. Further, a second authentication request is input into the authentication device together with a second challenge value, and the authentication device outputs a second response value obtained by employing a common-key encryption method, using a common key, to encrypt a value corresponding to the second challenge value. In addition, a first response value is input into the authentication device in response to the first challenge value, and a determination is carried out to ascertain whether a decoded result obtained by decoding the first response value using the common key matches the value corresponding to the first challenge value. |
