摘要
为了安全的使用图像加密方案,促进图像加密技术的进一步发展,对这些加密算法的安全性进行比较与分析是非常必要的。提出了对加密图像置乱度进行评价的若干参数,这些参数包括:不动点比、信息熵、灰度平均变化值、图像r-m自相关度和图像相似度。最后利用这些参数对图像加密算法进行了模拟实验分析和安全性评价。
To use schemes of image encryption safely and to improve the technology of image encryption, it is very necessary to compare and analyze the algorithm of image encryption. In this thesis, some parameters such as the percentage of unchanged point, the information entropy, and the average of pixel grey-scale values change, the r-m self-correlation of image and comparability of image are given to evaluate the image scrambling. At last using the parameters, the algorithm of image encryption is tested and the safety of the algorithm is evaluated.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第24期4729-4731,4738,共4页
Computer Engineering and Design
关键词
图像加密
置乱度
信息熵
图像相似度
安全性分析
image encryption
scrambling criterion
information entropy
comparability of image
analysis of security
