DPA-Resistant Algorithms for Trusted Computing System

Side channel attacks could efficiently break cryptographic algorithm based on hardware implementation including applications on trusted computing systems. Chinese researchers had proposed a standard encryption algorithm, called SMS4, for their own wireless LAN communications in 2006. In this paper, we propose a modified fixed-value masking algorithm for SMS4 in order to resist again power analysis attack to hardware based SMS4. Furthermore, we simulate the attacking environments and port the proposed countermeasure to FPGA platform. The experimental results show that the proposed countermeasure can efficiently resist against power analysis attack.