基于双重混沌映射的图像加密方法

Image Encryption Algorithm Based on Dual Chaotic Maps

对于数字图像保密问题,利用混沌映射的随机性和敏感性以及优秀的混叠特性提出一种基于双重混沌映射的图像加密算法。对图像的置乱采用猫映射,而对于图像的扩散则采用Henon映射来处理;经过仿真分析可知该方法具有较大的加密密钥空间、加密速度快以及抗攻击等安全特性。可以作为一个加密系统的子模块应用于DSP图像处理的系统中。

Facing the security problem of digital image,with the randomness,the excellent mixing characteristics and the sensitivity of chaotic maps,this paper proposes an image encryption algorithm based on dual chaotic maps.This paper uses cat map on the image scrambling,and for image diffusion using Henon mapping.Simulation analysis shows that this method has high encryption key space,encryption speed and resistance to attacks and other security properties.