Braille for Visual Cryptography

Visual Cryptography (VC) has been studied as a significant way of information security. In VC, original secret is divided into two images called shares. VC shares show no clue for secret perceptually, whereas participants are able to obtain the secret by simply superimposing the shares. Despite the obvious advantages of VC in crucial secret protection, one of its issues appears to be the authentication method for VC shares. It is likely to seek assistance from other areas of digital image processing. As an international standard reading guidance for the visually impaired people, Braille has been widely used as an effective communication channel. In this paper, we will explain Braille encoding and explain how it is applied to handle the authentication problem in VC. Our contribution is to use Braille for VC. To the best of our knowledge, this is the first time the Braille has been employed to the authentication of VC.