New Method of Power Analysis Against Block Cipher Algorithms
Jie Cui · Jisuanji gongcheng · 2007
Block cipher cryptosystems embedded in cryptographic devices are sensitive to a series of cryptanalysis such as power analysis.The Walsh spectrum is an important basis for studying the Boolean functions in block cipher.This paper proposes a new method based on Walsh spectrum to reveal the key embedded in cryptographic.Furthermore,conclusion are drawn and proved that the vulnerability against power analysis caused by the highly nonlinear S-boxes.Experimental results indicate that the new method speeds up the revelation of key and yields higher precision.