一种新的数字图像加密算法

利用混沌原理,提出了一种新的二维可逆混沌映射,通过对图像的拉伸和折叠处理,实现了图像的混沌加密。首先按照扫描与插入原则将原始图像拉伸为一条直线,然后按照原始图像的大小,将直线折叠为一个新的图像。映射包括左映射和右映射两个子映射,将密钥设计为二维混沌映射的左映射和右映射的组合。仿真结果表明,图像在加密与解密前后没有信息缺失,且具有较好的安全性。

A new digital image encryption approach

A new 2D invertible chaotic map is proposed to realize image encryption,based on the principle of chaotic stretching and folding.Firsdy,a square image is stretched to a line by the principle of scanning and inserting,and then,the line is folded over to a new square image of which size is same as the original image.The map consists of the left map and the right map,of which numbers are used as the keys.The simulation results show that the image encryption has no information loss,and has better safety and noise resistance.