AN AES ENCRYPTION METHOD OF ANTI-DIFFERENTIAL POWER ATTACK

摘要

The present invention discloses an AES encryption method of anti-differential power attack. In a batch of AES encryption/decryption, two encryption paths are used; all the encryption intermediate results in each encryption path are different from those in the AES algorithm and changed in different batches randomly; the calculation results of the two encryption paths are returned to the round calculation results of AES standard only at the end of the round. Compared with the prior art, the present invention has the following technical effect: 1. the complexity of hardware realization is low and the structure of circuit only needs to be modified little; 2. the steps of software realization are simple and the basic operation of bottom layer doesn't need to be varied, the maintenance is easy; 3. the relativity among the power information, Hamming weight of AES standard intermediate result and the power data (including power and electromagnetism radiation) generated by the present method is released completely, then well side-channel security is provided in the case that the processing steps are added a few.