A New SHA-1 System to Resist Modular Differential Attack
Xiaodong Gao · Journal of Beijing Electronic Science and Technology Institute · 2012
News modify technique and method of modular differential attack pose a serious security threat to SHA-1.Based on the fact that SHA-1 security defects cannot resist modular differential attack,an improvement algorithm of SHA-1 is proposed.This algorithm can effectively increase difficulties using news modify,and get good differential diffusion characteristic.Due to improved SHA-1 merely changed step function,only added a addition and cycle shift,did not change the filled information and digest length,therefore easy to implement to update original hardware and software based on SHA-1.Efficiency is alike between improved SHA-1 and standard SHA-1 through proving and realizing.