一种基于双随机数的图像置乱加密方法

A DIGITAL IMAGE SCRAMBLING AND ENCRYPTION ALGORITHM BASED ON DUAL RANDOM NUMBER

利用混沌性质,提出一种数字图像双置乱加密方法。首先通过种子产生一维随机混沌序列并排序,再利用排序前后序列中各元素在位置上的一一对应关系,对图像序列进行相应移位,便实现了像素点位置的置乱;然后将移位后的像素点与另一组整数随机序列进行异或运算,便实现了像素值的置乱,算法无需迭代,实现简单,效率较高,安全性较好,有一定的应用价值。

A new digital image dual scrambling and encryption algorithm based on the features of chaos sequence is presented. The one dimensional random chaos sequence is created by seeds and sorted at first, and the image order is shifted with regard to one-to-one corresponding relations of the position of each element before and after the sorting. Thus, the pixel position scrambling is realized. Then, the Exclusive Or operation on the shifted pixel points with another group of integer random sequence is carried out to realize pixel value scrambling at the same time. The algorithm bears nice scrambling efficiency and security. It is easy to realize, and no iteration is needed. It is an algorithm with promising application value.