An Expression Method to Implement S-Box and Inverse S-Box Substitution for AES Algorithm
S-Box substitution and inverse S-Box substitution are the major bottleneck for AES algorithm ,which directly affect the speed of AES chip .On the basis of optimizing Q-M simplifying method ,this paper proposes an expression method to implement the S-Box substitution and inverse S-Box substitution in AES algorithm .Compared with the widespread use of the look-up-table method ,the expression method can reduce the delay ,area and power of circuit by 8 .5% ,27 .4% and 17% respectively .
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NSTL
万方数据
维普
