CRYPTOGRAPHIC PROCESSING APPARATUS, CRYPTOGRAPHIC PROCESSING SYSTEM, AND CRYPTOGRAPHIC PROCESSING METHOD

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.

主权项

1. A cryptographic processing apparatus for encrypting and decrypting data, the cryptographic processing apparatus comprising:
a key data storage area in which a plurality of pieces of key data used for encryption and/or decryption are stored; a mode setting circuit configured to set, for at least one of the plurality of pieces of key data stored in the key data storage area, a process mode of either of an encryption process and a decryption process in association with the key data; and a process limitation circuit configured to receive a mode specifying command for specifying a process mode in association with key data from another apparatus, and if the received process mode and the process mode associated with the key data set in the mode setting circuit coincide with each other, permit the process in the process mode using the key data.