一种基于混合混沌动力系统的图像加密算法  

Image encryption algorithm based on mixed chaotic dynamic systems

作　　者：彭飞[1] 丘水生[1] 龙敏[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《计算机应用》2005年第3期543-545,556,共4页journal of Computer Applications

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)

摘　　要：讨论了一种基于Lorenz系统、Chen s系统以及Lü系统的混合混沌动力系统的图像加密算法。该算法通过密钥映射产生混合混沌动力系统的初始条件,利用混合混沌动力系统产生的混沌信号对图像信号进行掩盖加密。仿真与讨论结果表明,该算法密钥空间大,混沌信号的产生极其敏感地依赖于密钥,具有较好的加密效果和加密效率,并对统计分析具有较好的安全性。The paper proposed an image encryption algorithm based on mixed chaotic dynamic systems including Lorenz system, Chen system and Lü system. With the map of the external keys, the initial condition of the mixed dynamic systems was acquired and chaotic signals were generated subsequently, then the plain image was encrypted by masking with the chaotic signals. The simulation and analysis results show that the chaotic signals are greatly sensitive to the keys and the algorithm has a large space of keys to acquire good encryption effects and efficiency, and a better security performance to statistical analysis.

关 键 词：混沌 混沌动力系统 混沌加密 图像加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]