基于自生成模m单元矩阵的双置乱图像加密的快速算法  

A High-speed Image Two-scrambling Encryption Algorithm Based on Self-generating Unit Matrix Model m

作　　者：张丽娜[1] 

机构地区：[1]西安科技大学计算机科学与技术学院,西安710054

出　　处：《科学技术与工程》2013年第9期2555-2561,2571,共8页Science Technology and Engineering

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.

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 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]