Implementation of SM4 Algorithm based on Asynchronous Dual-Rail Low-power Design

摘要

Chips in Internet of Things devices require extremely low power consumption and excellent security. In this paper, we present the first implementation of the SM4 algorithm literally. Taking advantage of asynchronous dual-rail domino logic pipeline, which can naturally avoid abundant request signals and register flips, the power consumption of SM4 can be largely reduced. Prototyped on SMIC 0.18um technology, we designed an asynchronous pipeline architecture of SM4 encryption algorithm. Compared with synchronous designs [2], our design has smaller area and lower power consumption while possess strong resistance to side channel attack spontaneously. The circuit simulation results show that the full pipeline SM4 algorithm can achieve 21.26Gbps throughput, while a single round of encryption costs just 6.07mW on average with the delay 2.8ns. For comparison, we normalized the throughput to [2] and get a 20x improvement on power consumption.