基于异或的外形比例不失真(k,n)视觉密码方案  

ASPECT RATIO INVARIANT(K,N)VISUAL CRYPTOGRAPHY SCHEME BASED ON XOR

作　　者：董晨 张皓宇 季姝廷 李磊 Dong Chen;Zhang Haoyu;Ji Shuting;Li Lei(Tianjin Key Laboratory of Intelligence Computer and Novel Software Technology,School of Computer Science and Engineering,Tianjin University of Technology,Tianjin 300384,China;Big Data Management Center,Tianjin 300221,China)

机构地区：[1]天津理工大学计算机科学与工程学院天津市智能计算及软件新技术重点实验室,天津300384 [2]天津市大数据管理中心,天津300221

出　　处：《计算机应用与软件》2020年第9期272-276,281,共6页Computer Applications and Software

基　　金：国家级大学生创新创业训练计划项目(201810060008)。

摘　　要：通过设计基于奇偶列的加密矩阵构造方法,结合多行扫描和多点加密的像素不扩展技术,提出一种基于“异或”运算的(k,n)视觉密码方案,并证明方案的安全性和有效性。实验结果表明,该方案能够实现秘密图像的外形比例不失真恢复,同时提高相对差,有效改善图像的恢复效果。By designing the construction method for encryption matrix based on odd-even columns,and combining the pixel unexpanded technology with multi-lines scanning and multi-pixel encryption,this paper proposes a(k,n)visual cryptography scheme based on"XOR"operation.Meanwhile,the security and effectiveness of our scheme is proved.The experimental results indicate that our scheme can achieve the undistorted restoration of the aspect ratio of the secret image.The relative difference is increased,and the restoration effect of the image is effectively improved.

关 键 词：视觉密码 异或 门限结构 外形比例不失真 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]