混沌系统的变参数前后反馈加密算法

将混沌映射应用于信息文档加密中,设计了一种基于Logistic映射简单快速的加密算法。为了提高信息加密的安全性和增大密钥空间,选取两个系统参数和初始迭代次数作为密钥,通过明文和密文共同反馈改变Logistic映射的迭代次数且由迭代值反馈改变系统参数和初值,实现对明文的动态加密。仿真结果表明,该算法能够有效地抵抗混沌系统常见的相图攻击、统计攻击和穷举攻击。

Encryption algorithm of input-output feedback based on chaos map

A simple and fast encryption algorithm based on Logistic map is designed for the encryption of the information documents.In order to enhance the security of the encryption system and increase the key space,the Logistic map’s iterations are changed by the plaintext and ciphertext through a common feedback,and then the values of system parameters are altered by the iterative feedback.So the plaintext can be encrypted dynamically.The simulation results show that the encryp- tion algorithm can effectively resist the common assault of chaotic systems,like phase diagrams attack,statistical attack,and brute-force attack.