Differential-Algebraic Analysis of SMS4 Block Cipher Algorithm
LV Xiaoqing · Journal of Chengdu University · 2012
Differential analysis is the most effective and commonly used analysis method in block cipher.Algebraic attack is also one of analysis method for block cipher analysis.Its weakness is that the more rounds it has,the more number of equations and the solving equations will be more difficult.The combination of these two methods will make up for their deficiencies and trivialities only to make the analysis more efficient.Based on in-depth analysis of SMS4 cryptographic algorithm characteristics,differential-algebraic analysis method is combined to analyze SMS4 cryptographic algorithms.The findings of 20 round SMS4's empirical analysis proves the validity of differential-algebraic analysis method used for block cipher analysis.