Efficient Constant-Time Implementation of SM4 with Intel GFNI instruction set extension and Arm NEON coprocessor

ePrint Report: Efficient Constant-Time Implementation of SM4 with Intel GFNI instruction set extension and Arm NEON coprocessor

Weiji Guo

The efficiency of constant-time SM4 implementation has been lagging behind that of AES for most internet traffic and applicable data encryption scenarios. The best performance before our works was 3.77 cpb for x86 platform (AESNI + AVX2), and 8.62 cpb for Arm platform (NEON). Meanwhile the state of art constant-time AES implementation could reach 0.63 cpb. Dedicated SM4 instruction set extensions …

arm coprocessor eprint report extension intel neon