摘要
图像数据具有大容量、高冗余性、像素之间高相关性以及较大的尺寸等特性,传统的加密方法存在一定的局限性而不太适合实时应用。利用混沌系统具有良好的混迭特性,对初始条件极端敏感,类随机性等特点,提出基于猫映射和Logistic映射的双混沌图像加密算法。猫映射对像素点位置数据进行置乱,Logistic映射对图像灰度值进行扩散,反复进行多次加密。实验证明,该算法有较大的密匙空间,安全性高;加/解密速度快,效果好,可以应用于常规网络或中高速无线传感器网络图像的加密传输。
Image data is of the characteristics of large capacity,high redundancy between pixels high correlation and a larger size and so on.Traditional encryption methods are not suitable for real-time applications due to some limitations.In this paper, chaotic system,with well-aliasing features,extreme sensitivity to initial conditions,the random characteristics,is proposed based on the cat map and Logistic map pairs of chaotic image encryption algorithm.Cat map scrambles the pixel location data and Logistic map diffuses the image gray value,repeating a number of encryption.
出处
《工业控制计算机》
2012年第12期74-75,共2页
Industrial Control Computer
