基于混沌反馈模型的图像加密算法的分析

Analysis of Chaos-based Feedback Cryptographic Scheme of Human Video Objects

对一个基于混沌反馈模型图像加密算法的安全性进行了分析,利用加密算法中密钥在乱数中扩散的不完全性,给出了一个分割攻击方法。证明了该方法的穷举复杂度为2^(21),成功率为1,将密钥熵降低了235bit。因此该加密算法是不安全的。

This paper analyzes the security of the chaos-based feedback cryptographic scheme of human video objects and gives a divide-and-conquer attack algorithm against it by using the incompleteness of which the key information diffuses in keystreams. The exhaustive complex ty is 2- and the success rate of the attack algorithm is I. The decrease of key entropy is 235bits. So this encryption algorithm is insecure.