摘要
给出了一种双置乱图像加密快速算法。算法以生成的n维模m单元矩阵作为置乱矩阵,通过置乱图像像素的空间位置和置乱图像像素值相结合的双重置乱算法达到加密图像的目的。算法流程以数论知识为基础通过扩展密钥空间和扰乱图像的直方图提高了图像加密的安全性。图像加解密的效率也有较大提升。
A new double image scrambling encryption algorithm is presented which is based on the number theory and uses n-dimensional matrix model m as a permutation matrix. The proposed algorithm encrypts images through scrambling the space location which contains pixels and the pixels of the specific location. The implementa- tion of this algorithm improves the security of the image encryption through expanding key space and scrambling the image histogram. At the same time the efficiency of the images encryption and decryption has been greatly enhanced.
出处
《科学技术与工程》
北大核心
2013年第9期2555-2561,2571,共8页
Science Technology and Engineering
关键词
图像置乱
模m单元矩阵
矩阵求逆
密钥空间
图像直方图
image scrambling matrix unit model m gram matrix inversion key space image histogram
