Capability of evolutionary cryptosystems against differential cryptanalysis  

作　　者：ZHANG HuanGuo 1,2 ,LI ChunLei 1,2 & TANG Ming 1,2 1 School of Computer,Wuhan University,Wuhan 430072,China 2 Key Laboratory of Aerospace Information Security and Trusted Computing of Ministry of Education,Wuhan University,Wuhan 430072,China 

出　　处：《Science China(Information Sciences)》2011年第10期1991-2000,共10页中国科学（信息科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.69973034,90104005,60373087,60673071,60970115,60970116,91018008,60970006,61003267)

摘　　要：The evolutionary cryptosystem is a new cryptosystem. This paper studies its security level resisting against differential cryptanalysis. It is shown that the evolutionary cryptosystem possesses higher resistance than its initial fixed cryptosystem against differential cryptanalysis. On the basis of the relationship among the data complexity, the bit advantage and the success rate of differential cryptanalysis, it is proven that more data is needed for attacking the evolutionary cryptosystem when the bit advantage and success rate are identical. Moreover, it is shown that the time complexity for attacking the evolutionary cryptosystem is higher than that of differential attacking its initial fixed eryptosystem with the same amount of plaintext-ciphertext pairs. The research indicates that the evolutionary cryptosystem is more robust than its initial fixed cryptosystem against differential cryptanalysis.The evolutionary cryptosystem is a new cryptosystem. This paper studies its security level resisting against differential cryptanalysis. It is shown that the evolutionary cryptosystem possesses higher resistance than its initial fixed cryptosystem against differential cryptanalysis. On the basis of the relationship among the data complexity, the bit advantage and the success rate of differential cryptanalysis, it is proven that more data is needed for attacking the evolutionary cryptosystem when the bit advantage and success rate are identical. Moreover, it is shown that the time complexity for attacking the evolutionary cryptosystem is higher than that of differential attacking its initial fixed eryptosystem with the same amount of plaintext-ciphertext pairs. The research indicates that the evolutionary cryptosystem is more robust than its initial fixed cryptosystem against differential cryptanalysis.

关 键 词：information security CRYPTOLOGY evolutionary cryptosystem CRYPTANALYSIS differential cryptanalysis. 

分 类 号：TN918.2[电子电信—通信与信息系统]