| 摘要 |
PROBLEM TO BE SOLVED: To provide an encryption processing apparatus with high immunity to a DFA attack. SOLUTION: As clock signals for controlling data storage timing to registers for storing a result of round arithmetic operations, separate clocks (CLK1, CLK2) are respectively given to a master and a slave for configuring each register, and an output of, e.g. an oscillator applies retiming to the clocks to produce sets of a plurality of clock signals (CLK-1, CLK1-2) to (CLK2-n, CLK-2-n) with a plurality of timings, which are selectively supplied to the master and the slave as register configuration circuits thereby achieving bit data capture in the different timings. Through the configuration above, the encryption processing apparatus with high immunity to a DPA attack by statistic processing of a consumed current is obtained. COPYRIGHT: (C)2007,JPO&INPIT
|
