基于混沌动力系统的数字图像加密方法  

Novel image encryption scheme based on chaotic system

作　　者：王朋飞[1] 冯桂[2] 

机构地区：[1]安徽工业大学计算机学院,安徽马鞍山243002 [2]国立华侨大学信息学院,福建泉州362021

出　　处：《计算机工程与应用》2007年第13期55-57,共3页Computer Engineering and Applications

基　　金：国家自然科学基金(the National Natural Science Foundation of China under Grant No.60472106);国立华侨大学科研基金资助项目(No.03BS202)。

摘　　要：提出一种新的基于混沌有序化映射的数字图像加密方法。把混沌矩阵映射成有序矩阵同时得到混沌有序化映射;给出了加密算法的置乱模块和替代模块;设计了空间域和频率域加密算法。频率域加密密文图像能根据传输率要求随时进行相应压缩比的有损压缩,并能解密得到较低失真率的解密图像。实验结果表明所提图像加密方法安全、高效。A novel image encryption scheme based on chaos-sorting technique is proposed.The chaos-sorting map is generated by sorting the chaotic matrix in order.The permutation module and the substitution module are designed.Encryption algorithms in spatial domain and frequency domain are proposed.For the encryption algorithm in frequency domain,the cipher-image can be lossy compressed,and low-distortion plain image can be obtained after deerypting the compressed cipher-image.Simulation results and analysis demonstrate that the proposed scheme is of favorable security and efficiency.

关 键 词：图像处理 图像加密 混沌有序化映射 密文图像压缩 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]