| 摘要 |
A process mode of either of an encryption process and a decryption process is set for at least one of a plurality of pieces of key data, in association with the key data. Then, a mode specifying command for specifying a process mode in association with key data is received from another apparatus, and if the received process mode and the process mode associated with the key data coincide with each other, the process in the process mode using the key data is permitted. |
