一种抗差分攻击的图像加密算法  

An image encryption algorithm against differential attack

作　　者：吕翔 王晓洁 杨刘洋 楼梦佳 陈明峰 邓雨亭 付娜[1] LYU Xiang;WANG Xiaojie;YANG Liuyang;LOU Mengjia;CHEN Mingfeng;DENG Yuting;FU Na(College of Physics and Electronic Information Engineering,Zhejiang Normal University,Jinhua 321004,China;Tongnan Senior School,Chongqing 402660,China;College of Economics and Management,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学物理与电子信息工程学院,浙江金华321004 [2]重庆市潼南中学,重庆402660 [3]浙江师范大学经济与管理学院,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2020年第1期39-45,共7页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省科技厅创新团队项目(2010R5007)

摘　　要：为构造一种基于混沌序列、置换矩阵和拉丁方的图像加密算法,首先将加密图像矩阵与基于Logistic模型的混沌序列构成的矩阵进行像素值异或,完成图像的预处理;然后使其嵌入一个更大的随机矩阵并标记;最后运用置换矩阵和完备拉丁方进行若干次图像像素位置的置乱.仿真结果及参数计算表明:该算法加/解密效果理想,密钥大小适中,密钥空间巨大,加密时间短,并且能够抵抗多种攻击.An image encryption algorithm based on chaotic sequences,permutation matrices and Latin squares was constructed.Firstly,an XOR operation was performed between a grey-scale map and a matrix composed of a chaotic sequence based on the Logistic model in order to complete image preprocessing.Secondly,it was embedded in a larger random matrix and marked.Thirdly,the positions of image pixels were scrambled by permutation matrices and a complete Latin square.It was showed by simulation and parameter calculations that the encryption was effective,the key size was moderate,the key space was large,the encryption time was short and had ideal performance to resist various attacks.

关 键 词：图像加密 拉丁方 混沌序列 矩阵变换 差分攻击 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]