| 摘要 |
A communication device that stores a secret key to be used in an authentication and an encryption of communication information with respect to a specific communication device, and carries out communications with the specific communication device, by using the stored secret key to be used with respect to the specific communication device, is equipped with a unit for updating a specific secret key, when an update request received from another communication device is requesting a secret key updating, according to an update content given along with the update request which indicates the specific secret key. |
