摘要
提出一种基于Arnold变换的图像加密新算法。利用二维和三维Arnold变换混沌轨道的遍历性,提出一个新的空间置乱方法。该方法可以改进传统的Arnold变换置乱方法密钥空间小的缺点,并可以提高置乱度。利用耦合映象格子(CML)映射对图像灰度值进行扩散,进一步扩大了密钥空间,提高了加密系统的安全性。实验结果表明,本文的加密算法加密效果好,安全性高,可以抵抗统计分析并具有抗JPEG压缩、剪切等攻击的鲁棒性。
A novel image encryption scheme based on the chaotic orbit ergodicity of Arnold transformation is proposed. The proposed scheme can enlarge the key space greatly and improve the scrambling degree as well. In addition, the coupled ma Plattice ma Pis applied on the diffusion process to improve the security of the encryption system. Experiment results show that the encryption scheme owns good encryption effect and high security. It can resist statistic attack; it is robust against JPEG compression, cropping attacks and so on as well.
出处
《微计算机应用》
2009年第9期14-21,共8页
Microcomputer Applications
