摘要
混沌系统对初始条件和混沌参数非常敏感,生成的混沌序列具有非周期性和伪随机性的特性,近年来在图像加密领域中得到了广泛的应用。该文提出了一种基于改进的混沌猫映射的图像加密算法,该算法利用混沌猫映射和扩散函数相结合来对数字图像进行置乱加密。改进后的混沌猫映射不仅可以基于像素点进行空间域的变换加密,而且可以基于色度域进行变换加密,从而可以有效地抵抗统计攻击。实验结果表明,提出的算法能够得到令人满意的加密效果。
Chaos is widely used in image encryption because of its high sensitivity to initial conditions and parameters and its generated chaos series without circle and of pseudo stochastic. An image encryption algorithm based on improved chaotic cat maps is proposed. In this method, the image is encrypted by diffusion function and improved chaotic cat maps, which can encrypt image not only based on disordering the positions of image pixels but also based on changing image pixels＇ value, thereby significantly increasing the resistance to statistical attacks. The method is proved to work well.
出处
《计算机工程》
CAS
CSCD
北大核心
2007年第10期166-168,共3页
Computer Engineering
关键词
混沌
图像加密
猫映射
扩散
Chaos
Image encryption
Cat maps
Diffusion
作者简介
张燕（1982-）,女,硕士生,主研方向：图像处理,视频处理;E-mail：210317042@suda.edu.cn
黄贤武,教授、博导;
刘家胜,博士生
