The 128-bit SM4 algorithm is the first commercial cipher published by China
which is mainly used in wireless LAN.In order to improve the algorithms resistance to differential power analysis attack
the additive masking is adopted to keep the SM4 cipher resistant to the first-order DPA.The simulation results show that the counteractive against differential power analysis attack is credible.In order to realize a small-area
low-power circuit of SM4 cipher
the PPRM architecture is adopted in the hardware implementation of SM4S-box.A power consumption of 0.74mW@10MHz using SMIC 0.18m technology is achieved
which is 70% less than that of the SM4S-Box in composite field.