一种新颖的混沌分组密码算法  

Novel Chaos Block Cipher Algorithm

作　　者：张向华[1] 

机构地区：[1]重庆教育学院,重庆400067

出　　处：《计算机科学》2009年第5期92-95,共4页Computer Science

基　　金：重庆市教委资助项目(KJ071504)资助

摘　　要：在研究已经提出的一些混沌加密算法的基础上,提出了一种新的混沌分组密码算法。算法的密钥包含64位的外部比特流K和Logistic映射的初值x0两部分,同时也用这个混沌映射定义了一个双射映射。然后通过3种代数运算和由双射映射确定的置换运算还用在64比特的明文上,产生64比特的密文。理论与实验分析表明该算法克服了一些纯混沌密码系统的固有缺陷,同时也具有较高的性能。Based on the study of some existing chaotic encryption algorithms,a new block cipher was proposed. In the proposed cipher, the key is comprised of an external 64-bits K and the initial value x0 of the logistic map. At the same time, a bijection map was also defined by the logistic map. Then three algebraic operations in the group and permutations were applied on plaintext with block length of multiples of 64 bits to produce ciphertext blocks of the same length. Analysis shows that the proposed block cipher does not suffer from the flaws of pure chaotic cryptosystems.

关 键 词：分组密码 混沌映射 代数运算 安全 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]