一种新的图像加密算法

A new image encryption algorithm

图像的纯位置置乱惟一对应一个置换群元素和排列,基于此给出了一种基于混沌序列和全排列的图像置乱加密算法.首先,定义了置换群元素新的表示符号,用N进制计数法建立起了置换群元素与整数的一一对应;然后利用混沌序列随机选择置换元素对像素的位平面、图像的四叉树结构置乱.试验证实了该算法的有效性,并得到了较好的加密效果.

By using natural enumerative system a one-to-one mapping is constructed between integer and permutation. Based on this and by using chaotic sequence to select permutation randomly to swap bits of byte of every pixel, different scan patterns in the scan tree structure are selected. Some experimentations are carried out to illustrate the good performance of the proposed method.