文章基本信息

标题：Refinement of visual secret sharing scheme without image size expansion
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作者：Ms. Smita Patil ; Prof. Ms. Jyoti Rao
期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2014
卷号：3
期号：5
页码：6057-6061
出版社：IJECS
摘要：The basic idea of the Visual Cryptography is to encrypt a secret image into n number of meaningless share images. The VisualCryptography technique cannot leak the encrypted information of the shared secret by virtue of any combination of the n share imagescombined together. The share images are printed on transparencies and distributed as shares such that, when the shares aresuperimposed, a concealed secret image is discovered. The human visual system can recognize the shared secret image without using anycomputational devices. It needs neither cryptography knowledge nor complex computation. The Visual Cryptography technique formultiple secrets is proposed, which encrypts more than one secret into the equivalent number of share images .The traditional visualsecret sharing scheme uses a pre-defined pattern book to generate shares, which leads to a pixel expansion on share images. Thus tominimize the pixel expansion problem in VC scheme a new system is invented which can share two binary secret images on tworectangular share images without pixel expansion. The proposed approach, not only has good contrast, but also has an excellentrecovery quality for secret image and the critical problem of pixel expansion is minimized
关键词：Visual secret sharing scheme; Image processing; Pixel expansion; Contrast; Camouflage