计算机应用研究2017，Vol.34Issue(1)：233-237,255,6.DOI:10.3969/j.issn.1001-3695.2017.01.053
基于改进cat映射与混沌系统的彩色图像快速加密算法
Improved cat map and chaotic system based fast color image encryption algorithm
摘要
Abstract
Aimed at the problem that the existing chaotic system based image encryption algorithms has high computational complexity,this paper proposed an improved cat map based color image encryption algorithm with low computational complexi-ty and easily to implement.The proposed method contained two layers.In permulation layer,it used bit based permulation to replace the traditional byte based permulation to disrupt the positions of the pixels completely,and improved the traditional 2 dimensional cat map,so that improved the computational efficiency drastically,it designed uniform chaotic fake random se-quence generator to change the control parameters of each iteration of the encryption process dynamically,and improved the se-curity of the encryption system;in diffusion layer,it used bit matrix to diffuse each block.Real images based experimental re-sults show that the proposed method can resist different attacks and has a high computational efficiency.关键词
混沌系统/图像加密/cat映射/置乱层/扩散层Key words
chaotic system/image encryption/cat map/diffusion layer/permulation layer分类
信息技术与安全科学引用本文复制引用
孙倩,胡苏..基于改进cat映射与混沌系统的彩色图像快速加密算法[J].计算机应用研究,2017,34(1):233-237,255,6.基金项目
国家自然科学基金资助项目（61471160）；湖北省自然科学基金资助项目 （）
