基于异或解密的标记视觉密码方案  

Tagged Visual Cryptography Scheme Based on XOR Decryption

作　　者：徐梦琦 吕东辉[1] 任艳丽[1,2,3] XU Mengqi;Lü Donghui;REN Yanli(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China;Shanghai Institute of Advanced Communication and Data Science,Shanghai 200444,China;Key Laboratory of Scalable Computing and Systems,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海大学通信与信息工程学院,上海200444 [2]上海先进通信与数据科学研究院,上海200444 [3]上海交通大学可扩展计算与系统重点实验室,上海200240

出　　处：《应用科学学报》2019年第4期469-480,共12页Journal of Applied Sciences

基　　金：国家自然科学基金（No.U1736120,No.61572309）;上海交通大学可扩展计算与系统重点实验室开放课题资助

摘　　要：标记视觉密码是一种在分享份中嵌入标签为用户提供补充信息的视觉密码方案,现有的标记视觉密码方案存在着恢复秘密图像视觉效果较差、像素扩展以及需要设计加密矩阵等问题.为此,提出一种改进的基于异或解密的标记视觉密码方案.加密时,在生成的普通分享份中嵌入标记信息;解密时使用异或解密.通过该方案解密后的图像既不存在像素扩展问题,又不需要设计加密矩阵,同时还可以调节嵌入标记信息的概率.与现有的标记视觉密码相比,该方案恢复的图像更加清晰.Tagged visual cryptography is a new type of visual cryptography,which can hide tags into each generated common share to provide users with supplementary information.The existing tagged visual cryptography has some problems such as poor visual quality,pixel expansion and design of encryption matrices.Therefore,this paper proposes an improved tagged visual cryptography based on XOR decryption.In encryption process,the scheme embeds tagged information in the generated common share;and in decryption process,XOR operation is used to recover the secret image.The scheme decrypts the image without pixel expansion problem,and the requirement of design of encryption matrices.At the same time,it can adjust the probability of embedded tagged information.Compared with the existing tagged visual cryptography,the image recovered by the scheme is clearer.

关 键 词：标记视觉密码 异或解密 随机网格 图像加密 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]