摘要
利用由三维Lorenz系统,Chen系统,L系统和一维Logistic混沌映射生成的混沌序列复合成一系列的新序列,通过这些新序列设计一个既对图像像素位置进行置乱又对图像像素值进行扰乱的图像加密系统。对该系统进行数值实验与安全性分析,结果表明该系统密钥空间足够大(约为1073.81),对密钥和明文相当敏感,且具有优良的扩散性和扰乱性,同时还可以很好地抵抗噪声信号的干扰。
A series of new mixed chaotic sequences are generated by chaotic systems including Lorenz system,Chen system,Lü system and Logistic chaotic mapping.With these new sequences,a new image encryption system that shuffles the positions and changes the grey values of the image pixels is proposed.The results of simulation experiments and security analyses indicate that this encryption system has a large key space about 1073.81 and has quite a good sensitivity to the secret keys and the original image.And it also possesses perfect diffusion and confusion properties.At the same time it can resist nosie disturbances strongly.
出处
《计算机与数字工程》
2008年第1期90-94,共5页
Computer & Digital Engineering
关键词
复合混沌序列
图像矩阵
扩散性
扰乱性
噪声
composite chaotic sequences,image matrix,difussion,confusion,noise
