摘要
基于AES中的S盒理论,针对S盒的一一映射的特性对图像分块进行图像像素字节位置的置乱,提出了S盒图像置乱算法,在基于S盒图像置乱的标准算法引入混沌理论,产生混沌随机序列,提出S盒图像置乱加密的改进算法;并通过三种测试方法:抗剪切测试、高斯白噪音测试和分布均匀性测试以及客观评价方法就具体实例分析这种算法的安全性和抗剪切能力;最后将其与标准算法进行比较研究。
The thesis mainly studies the image encryption algorithm through combining the using of image encryption based on S-boxes scrambling with the using of chaos permutation.The chaos permutation algorithm could effectively improve the inefficiency of image encryption algorithm based on S-boxes scrambling and it is testified in the experimentation.Through three testing including anti-shear tests,Gaussian white noise tests and uniformity test and an objective evaluation methods on the specific example of this algorithm,the authors study the safety and anti-shear capacity of it.The new improved image encryption algorithm possesses the more excellent capability of encryption and security which make the image encryption algorithm based on S-boxes scrambling more available in the normal channel.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第19期50-52,56,共4页
Computer Engineering and Applications
关键词
S盒置乱
混沌理论
图像加密
S-boxes scrambling
chaos theory
image encryption
