A new countermeasure against side channel attack for HMAC-SM3 hardware

With the application of Hash-based Message Authentication Code(HMAC) in the field of security, the research on its Side Channel Attack(SCA) has been paid more and more attention. In this paper, a new countermeasure against side channel attack for HMAC-SM3 is proposed, which uses the ring oscillator technology to construct the power disorder module. Through analyzing the power consumption of the improved HMAC-SM3 hardware circuit on FPGA, we proved the effectiveness of this countermeasure. Compared with the traditional masking protection technique, the power disorder module has the advantages of simpler design, less hardware cost, and no influence on the performance at all.