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Basic Visual Cryptography Using Braille

Basic Visual Cryptography Using Braille

Guangyu Wang (Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China and Auckland University of Technology, Auckland, New Zealand), Feng Liu (Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China), and Wei Qi Yan (Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China and Auckland University of Technology, Auckland, New Zealand)
Copyright: © 2016 |Pages: 9
DOI: 10.4018/IJDCF.2016070106
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Abstract

As a significant part of information security, Visual Cryptography (VC) is a secret sharing approach which has the advantage of effectively obscuring hints of original secret. In VC, a secret image is separated into partitions which are also known as VC shares. The secret is only able to be revealed by superimposing certain shares. Since Basic VC is in a structure which is similar to that of Braille where white and black dots are arranged in certain orders, it is feasible to utilize the feature of Braille for the authentication of VC. In this paper, the authors will conduct an experiment embedding Braille into grayscale and halftone images as well as VC shares. The result indicates that the embedding of Braille has little impact on VC secret revealing and enhances the security of VC shares.
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Even though the security nature of VC, attack approaches have been investigated and proved to be effective. Hu and Tzeng (Hahn & Jung, 2006) explained numerous cheating methods and each of the methods is capable of cheating VC schemes. A vast number of other researchers have also attempted to develop practical applications including one involving biometrics (Hegde et al, 2008; Hu & Tzeng, 2007; Jin, Yan & Kankanhalli, 2004; Lee & Chen, 2012; Tuyls et al, 2005; Weir 7 Yan, 2009; Liu, Wu & Lin, 2008; Horng et al, 2006).

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