基于小波和混沌的图像置乱加密新算法

New Algorithm for Image Encryption Based on Wavelet and Chaotic Systems

提出了基于小波和混沌的多重置乱加密新算法。首先对图像进行一级小波分解,利用Arnold变换对低频图像像素位置进行置乱,再利用Logistic产生的序列对置乱图像进行异或,最后再进行小波合成。实验结果表明,新算法虽然对图像有轻微的破坏,但仍是一个高效的、安全性高的、相邻像素无关的置乱加密算法。

This paper presents a new image encryption algorithm based on wavelet and chaotic. Firstly, after the level one of wavelet, the Arnold transform is used to shuffle Low - frequency approximate son figure of the image. Then the sequence values of the Logistic chaotic system are adopted to exclusive or the shuffled image. The last is wavelet inverse transform. The experimental results demonstrate that the new algorithm has mild damage to an image, but it is efficient, high secure and independent of the adjacent pixel algorithm.