一种混沌加密设计与统计和熵分析

A design and statistics for Chaotic encryption and entropy analysis

从理论上对一种基于扰动加密系统所产成的一个漏洞作了一系列分析,在此基础上给出了一种新的改进算法。这种算法通过对扰动长度的随机化,而使得这种信息加密更安全。另外将这样所生成的密钥流通过一种位操作,使该算法可产生伪随机序列。应用于图像加密的实验结果表明加密后图像像素值有类随机均匀分布特性和很高的信息熵。

One loophole of the perturbing Chaotic systems was analysed and a new improved algorithm was proposed. By randomizing length of perturbation, the algorithm can get higher security for these perturbing chaotic encryptions. Then key stream into pseudo-random sequence was converted by a series of bit manipulations. The results showed that the distribution of pixel-values of the encrypted image had a random-like behavior and high information entropy.