A Research on the Security of SMS4 Algorithm
Zhang Dong · Journal of Beijing Electronic Science and Technology Institute · 2008
Under a simple power leakage model based on Hamming weight,we find some operation in SMS4 algorithm will leaks information about secret key which is vulnerable to differential Power Analysis attack.The attacks described are proven to be sound by using math analytical method and experiment.We propose two methods to modify the SMS4 algorithm in order to resistant against DPA and enhance the security of SMS4.