基于Logistic映射的动态密钥加密算法

混沌序列具有类随机性、对初始条件极度敏感性、遍历性和非周期性等特点,展现出优良的密码学性能。该加密算法通过Logistic映射产生混沌序列,并将混沌序列映射为64位二进制序列,结合DNA序列变迁重组算法和DES算法对64位明文分组进行加密,DES初始密钥处于动态变化中,能有效地抵御穷举攻击和选择密文攻击等多种攻击手段。

An Dynamic Key Encryption Algorithm Based on Logistic Map

haotic sequence with the features of randomness,the extreme sensitivity of the initial conditions,ergodicity and aperiodic traversal sensitivity ,show excellent cryptography performance. The encryption algorithm produces chaotic sequence through zLogistic map, and the chaotic sequence is mapped to the 64 binary sequence, which encrypts a 64 plaintext block combining DES algorithm and DNA sequence migration recombinant algorithm . DES initial key is in the mode of dynamic change. The algorithm can effectively resist many means of attack such as exhaustive attack and chosen ciphertext attack.