一种基于Henon映射的图像加密算法的分析及改进

Analysis and Improvement of Image Encryption Algorithm Based on Henon Map

该文对一种基于Henon映射的快速图像加密算法进行了分析,指出该算法存在明文敏感性不足和像素点逐个处理的问题。进而提出了一种改进的图像加密算法。改进算法将原算法的单点链接方式变成双点链接方式,从而获得了更好的扩散效果和更高的计算效率。实验仿真结果表明,改进的算法在安全性和加解密速度方面均有更好的表现。

A fast image encryption algorithm based on Henon map is analyzed and the weaknesses of the algorithm are proposed that have a low sensitivity to the plainimage and processes pixels one by one. An improved algorithm is proposed. The improved algorithm obtains good diffusion property and high processing efficiency by changing the single-point chaining way into the two-point chaining way. Experimental results show that the new algorithm has a better performance on both security and speed.