【摘要】 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。更多还原

【Abstract】 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.更多还原