摘要
通过外部密钥映射产生混沌系统的初始条件及迭代次数,然后利用所产生的混沌信号对图像信号进行掩盖加密,在此基础上提出了一种图像加密算法.仿真结果表明,该算法提供了一种良好的混沌密钥空间设计方法,密钥空间大,具有较好的加密效果,对统计分析和差分攻击等具有较好的安全性.
An image encryption algorithm is put forward based on a method that the initial conditions and iteration time of a chaotic system are obtained from external keys, then image signals are encrypted using the subsequently produced chaotic signals. The simulated results show that the proposed algorithm is a good spatial design algorithm for chaotic keys, and possesses a large space of keys, fairly well encryption effect and excellent security to statistic analyses and different attacks.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第7期20-23,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60372004)
广东省自然科学基金资助项目(31445
20820)
关键词
外部密钥
加密
混沌
混沌序列
<Keyword>external key
encryption
chaos
chaotic sequence
