Chosen-plaintext power analysis attack against SMS4 with the round-output as the intermediate data

Abstract

The method of chosen-plaintext power analysis attack against SMS4 with the round-output as the intermediate data is proposed.Firstly,this method attacks out the output of the iterative function.Then the sub key can be achieved by the output of the iterative function.And it is achieved to make the attack real and improve the efficiency,when SMS4 is attacked by taking of the method.In particular,the actual experiment of the method is done,and the results show that the attack algorithm is correct and effective.

Keywords

• SMS4 algorithm;power analysis attack;round output;chosen-plaintext