摘要
为使低维混沌加密系统具有较高的安全性和良好的运算效率,提出一种基于Logistic映射和Tent映射的复合混沌加密系统。通过两种映射互反馈产生密钥序列,再对读取的明文进行加密;同时利用密文反馈的方式来改变混沌映射的迭代次数,使迭代过程具有一定的随机性。结果表明,与单一的Logistic混沌加密相比,该算法具有很大的密钥空间、较高的加密强度和低维混沌加密系统的良好的运算效率,而且能有效地抵抗穷举攻击、统计学攻击和相图攻击。
In order to increase the security of the low dimensional chaotic encryption system while not affecting the performance, a composite chaotic encryption system based on Logistic mapping and Tent mapping was presented. Firstly, the secret-key sequences were generated based on two mapping with mutual feedback, which was used to encrypt the plaintext; at the same time, the number of chaotic iterations was changed through cipher-feedback, and the iterative process has certain randomness. The results show, compared with single Logistic chaotic encryption, the algorithm not only has a large key space, high encryption intension and good operation efficiency of low dimensional chaotic encryption system, but also can resist brute- force attack, statistical attack and phase diagrams attack effectively.
出处
《计算机应用》
CSCD
北大核心
2012年第10期2768-2770,2775,共4页
journal of Computer Applications
基金
陕西省自然科学基金资助项目(2009JM 8015)
陕西省教育厅专项(2010JK815)
