中文摘要：

传统混沌图像加密算法均对图像的空间域进行处理，该情况的密钥敏感度较低、关联性较高，对此，提出一种基于小波变换域混沌加密与循环移位的改进图像加密算法。首先，根据原图像生成对应的密钥，并采用该密钥对原图像作循环移位处理；然后，将图像进行小波变换，获得小波变换域；最后，对图像进行二维混池映射，作置乱处理。实验结果表明，本算法的统计性能、鲁棒性能以及密钥敏感性均具有一定的优势。

英文摘要：

Traditional chaotic image en cryption a lgo rithm is based on the spatial domain of the image, leading to a low keyse nsitivity and difference perform ance, this paper proposed a chaotic encryption in w avelet transform and cycle sh ift based im provedimage en cryption algo rithm to overcome th a t problem . Firstly , it generated different keys according to the o rig in im a ges, it transform ed the image pixels were cycle shifted with the keys ; then it transform ed the image into wavelet domain ; lastly, it perform ed 2 D chaotic map to the im age, and substituted and diffu sed the o rig in code. E xperim ents results show th a t, theproposed a lgo rithm has a good perform ance in statistica l pe rform ance, robustness, key sen sitivity perform ance.