摘要： 为提高图像信息的安全性，提出一种基于多混沌映射的图像加密算法。将混沌序列和彩色图像像素点的坐标看作空间上的两点，利用2个点的距离公式计算生成加密因子，将图像与该加密因子做相应的代数运算，从而获得加密图像。仿真结果表明，该算法易于实现，对密钥具有较强的敏感性，密钥空间大，加密图像的像素值分布较均匀。
关键词:
混沌,
图像加密,
敏感性,
二维Logistic映射,
Ikeda映射,
Hénon映射
Abstract: This paper has brought forward a way of image encryption algorithm based on multiple chaotic maps for improving the safety of image information. This algorithm regards the chaotic sequence and the pixel coordinate of the color image as two points in space, using the formula of the distance of two points in space to generate the sequences to encrypt the image. Simulation results demonstrate that the algorithm is easy to carry out, has a strong sensitive effect on the key, its key space is enough large, and it has very uniform pixel-value distribution.
Key words:
chaos,
image encryption,
sensibility,
two-dimensional Logistic mapping,
Ikeda mapping,
Hénon mapping
中图分类号:
郭晓丛, 向菲, 刘伟. 一种基于多混沌映射的图像加密算法[J]. 计算机工程, 2012, 38(20): 93-96.
GUO Xiao-Cong, XIANG Fei, LIU Wei. An Image Encryption Algorithm Based on Multiple Chaotic Mapping[J]. Computer Engineering, 2012, 38(20): 93-96.