一种结合Cat和Logistic映射的混沌加密算法  

Design of digital chaotic encryption algorithm based on dual chaotic maps

作　　者：王亚伟[1] 王行愚[1] 

机构地区：[1]华东理工大学信息工程学院,上海200237

出　　处：《东南大学学报（自然科学版）》2005年第A02期128-131,共4页Journal of Southeast University：Natural Science Edition

基　　金：高等学校博士点专项科研基金项目(20040251010)

摘　　要：为了使混沌加密算法具有较高安全性的同时又有较好的运算效率,提出了一种利用Cat映射与Logistic映射作为2个混沌发生器,通过正逆序迭代产生的混沌序列对明文进行加密.结果分析显示该算法具有较好的加密强度;对比基于Lorenz系统的混沌加密算法,该算法具有较好的运算效率.解决了低维混沌序列保密性不够和高维混沌系统加密速率慢的缺点.In order to increase the security of chaos-based encryption algorithm while not affecting the performance, one kind of encryption algorithm based on the Cat map and improved Logistic map is put forward. The iteration of chaotic maps has two directions on which the encryption process is based. The results show that the encryption algorithm has good security features and better performance compared to the Lorenz based encryption algorithm. It conquers the low security defect of low-dimensional chaotic maps and poor performance defect of high-dimensional chaotic maps.

关 键 词：混沌加密 CAT映射 LOGISTIC映射 数据加密 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]