基于翻转技术的具有伪装图像的视觉密码方案

发布时间：2018-07-03 13:18

本文选题：视觉密码 + 分享图像　；参考：《吉林师范大学》2016年硕士论文

【摘要】：信息安全一直以来都是人们关注的重点,而秘密共享技术是解决信息安全的一种重要思想。秘密共享思想是把一个或多个秘密信息拆分开来分给多个人,不同数量的人在一起恢复不同数量的秘密信息。视觉密码是秘密共享技术的一个分支,它的优势在于解密者不需要密码学知识,只需要使用人的视觉进行解密,解密方式非常简单。视觉密码技术在继承秘密共享思想的同时又具有易于恢复的自身特性,并且应用前景十分广泛,因此引起了广大学者的研究兴趣。本文提出了一种基于翻转技术的具有伪装图像的视觉密码方案。主要贡献在于1.通过翻转技术实现两个秘密图像分享。2.对分享图像进行伪装,提高分享图像的安全性。方案主要思想是:在加密过程中,对秘密图像关于水平中线对称的一对像素进行加密,同时根据伪装图像的像素颜色对分享图像进行伪装,使分享图像具有一定意义,降低了分享图像受攻击的可能性;在解密过程中,把两张分享图像直接叠加可以恢复一幅秘密图像;对第二幅分享图像进行关于水平中线的上下翻转操作,然后再与第一幅分享图像叠加可以恢复第二幅秘密图像。本文第三章详细论述了该方案的分享方法,给出在伪装图像不同情况下的全部64组分享方案。第四章在Matlab 7.0软件中对方案进行验证,通过两个实验证实了该方案的可行性。
[Abstract]:Information security has always been the focus of attention, and secret sharing technology is an important idea to solve information security. The idea of secret sharing is to divide one or more secret information into more than one person and restore different amounts of secret information together. Visual cryptography is a branch of secret sharing technology. Its advantage is that decryptors do not need cryptography knowledge, only use human vision to decrypt, decryption is very simple. Visual cryptography technology not only inherits the idea of secret sharing, but also has the characteristic of easy to recover, and its application prospect is very extensive, so it has aroused the research interest of the majority of scholars. This paper presents a visual cryptographic scheme with camouflage image based on flipping technology. The main contribution is 1. Two secret images are shared by flipping technology. 2. Camouflage the shared image to improve the security of the shared image. The main idea of the scheme is: in the process of encryption, the secret image is encrypted about a pair of pixels with horizontal midline symmetry, and the shared image is camouflaged according to the pixel color of the camouflage image, so that the shared image has a certain significance. It reduces the possibility that the shared image will be attacked; in the process of decrypting, two shared images can be overlaid directly to restore a secret image; and the second shared image can be flipped up and down about the horizontal midline. Then superimposed with the first shared image can restore the second secret image. In the third chapter, the sharing method of the scheme is discussed in detail, and all 64 groups of sharing schemes in different cases of camouflage images are given. In the fourth chapter, the program is validated in Matlab 7.0 software, and the feasibility of the scheme is verified by two experiments.
【学位授予单位】：吉林师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.41;TP309

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