一种混沌序列加密算法的密码分析

摘要

This paper analzsed the security of a cipher based on a map of the logistic chaos sequence. However, the information leakage that the first several chaotic states generated by this encryption system were not sensitive to the change of the low order of initial input, makes the encryption system can not to resist the divide-and- conquer attacks, under the chosen plaintexts condition. The improvement, which making the distribution of coincidence degree of the keys tends to randomize, can effectively resist the attacks.%对一种基于Logistic混沌映射的序列加密算法进行安全性分析,此混沌序列具有前几个值对混沌初态的低位比特变化不敏感的信息泄漏规律,无法抵抗基于选择明文的密钥分割攻击,对此加密算法进行改进,使得密钥的吻合度分布趋向于随机化,能有效抵抗密钥分割攻击.