Topic
Visual cryptography
About: Visual cryptography is a research topic. Over the lifetime, 1724 publications have been published within this topic receiving 25300 citations.
Papers published on a yearly basis
Papers
More filters
26 Sep 2011
TL;DR: The idea is basic, but theoretical studies by formulating is important trial in this field, and the scheme has the feature of visual cryptography with respect to extracting of the embedded patterns.
Abstract: In this paper, we consider to formulate an image data hiding scheme based on error diffusion. By using the scheme, visual patterns are embedded in a halftone image without affecting its perceptual quality depending on a halftone key image. The scheme has the feature of visual cryptography with respect to extracting of the embedded patterns, i.e., when we print the two halftone images onto transparencies and stack them together, the embedded patterns are visible by human visual system without any special electronic calculation. We propose a formulation for the scheme in the view of a stochastic analysis. The idea is basic, but theoretical studies by formulating is important trial in this field.
2 citations
TL;DR: In this paper , the authors proposed a novel optical information hiding system based on complex-amplitude ptychographic encoding and visual cryptography, where the information to be hidden is a binary image.
2 citations
TL;DR: Visual Cryptography started as a procedure to encrypt binary images to hide messages containing text and has developed into encrypting color images as meaningful shares to conceal messages ranging from binary text to other color images.
Abstract: Over the earlier period, information technology has gain access to more and more regions of our society. The expansion of digital information and telecommunication systems released a extensive collection of novel possibilities which were grab to get better the effectiveness of different sorts of procedures. The area of Visual Cryptography has progressed progressively over the past some years. It started as a procedure to encrypt binary images to hide messages containing text and has developed into encrypting color images as meaningful shares to conceal messages ranging from binary text to other color images.
2 citations
01 Dec 2011
TL;DR: An efficient (2, 2) secret sharing scheme has been proposed where the generated shares are meaningful and the aspect ratio and image dimension of the shares remain constant with respect to the source image.
Abstract: In this paper an efficient (2, 2) secret sharing scheme has been proposed where the generated shares are meaningful and the aspect ratio and image dimension of the shares remain constant with respect to the source image. In the CARVCMS, instead of generating new pixels for shares, the shares are generated by random inversion of the levels of the pixel values. The scheme is more secured and very easy to implement like other existing techniques of visual cryptography. At the receiving end, the secret is revealed directly through human visual system by stacking the shares in arbitrary order with proper alignment. To expound the efficiency of the proposed technique, the results are compared with the technique developed by Naor and Shamir (1995), Hegde et al. (2008) and Jena and Jena (2009) where it has been shown that CARVCMS gives better performance.
2 citations
Journal Article•
TL;DR: 传统的视觉密码方案需要参与者相互验证,因此存在着一系列检测过程, 应用不够广泛等问题;
Abstract: 传统的视觉密码方案需要参与者相互验证,因此存在着一系列检测过程,不够简洁、应用不够广泛等问题;基于这一点,提出了一种需要引入第三方的防欺骗视觉密码分享方案;该方案采用异或(XOR)运算,利用可信第三方和受怀疑的分享图像能否恢复出验证图像来实现真实性检验,可直接验证分发者和参与者的欺骗行为,具有方便快捷和不受存取结构限制的特点.
2 citations