基于混沌系统和极化恒等式的数字图像加密算法

混沌系统具有初值敏感性。参数敏感性和类随机性等特性将图像分成大小为88的图像子块，利用经典的Logistic方程产生的混沌序列并对其排序生成匹配模板来改变图像子块的位置，然后利用极化恒等式内积分解加密算法改变图像像素的值因此，基于混沌系统和极化恒等式的数字图像加密算法使图像的像素的位置和值郜发生了变化，实现了图像的混淆和扩散仿真实验表明该方法进行图像加密具有可行性和安全性。

An Image Encryption Algorithm Based on Chaotic System and Polarized Identity

Chaotic system has such attributes as initial value sensitivity ,sensitivity of the parameters and random - like.. On the one hand ,dignital image is divided into 8 8 sub_block image . The sub_block images scrambled by the template matching that can be gotten by the typical Logistic equation . On the other hand encryption algorithm based on inner product polarized identity and vector inner product decomposition of a constant change each pixel value in an image. So the method can attain the purpose of image confusion and diffusion. Through theoretical analysis and simulation, the method was proved to work well.