| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for increasing difficulty in power analysis and reducing power consumption without damaging tamper resistance against side channel attack.SOLUTION: An encryption processing apparatus 100 sets each or one of a plurality of encryption processing parts 141-144 as a destination depending on a preset encryption mode to supply power to the destination, and transfers input data to the destination in a block unit; interrupts power supply to the encryption processing part that completes the encryption processing; and further, when setting one as the destination, transfers dummy block data to one and more encryption processing parts other than the one among the plurality of encryption processing parts. |
