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A New Bi-Level Encoding and Decoding Scheme for Pixel Expansion Based Visual Cryptography
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Author(s): Ram Chandra Barik (National Institute of Technology, Durgapur, India), Suvamoy Changder (National Institute of Technology, Durgapur, India)and Sitanshu Sekhar Sahu (Birla Institute of Technology, Mesra, India)
Copyright: 2019
Volume: 6
Issue: 1
Pages: 25
Source title:
International Journal of Rough Sets and Data Analysis (IJRSDA)
Editor(s)-in-Chief: Parikshit Narendra Mahalle (Department of Artificial Intelligence and Data Science, Bansilal Ramnath Agarwal Charitable Trust's, Vishwakarma Institute of Information Technology, India)
DOI: 10.4018/IJRSDA.2019010102
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Abstract
Mapping of image-based object textures to ASCII characters can be a new modification towards visual cryptography. Naor and Shamir proposed a new dimension of Information security as visual cryptography which is a secret sharing scheme among N number of participants with pixel expansion. Later on, many researchers extended the visual secret sharing scheme with no expansion of pixel regions in binary and color images. By stacking k shares the secret can be decoded using normal vision. In this paper the authors have proposed a modification towards visual cryptography by converting the message in the form of printable ASCII character-based numerical encoding patterns in a binary host image. The encoding of the message is represented as ASCII numeric and a texture of those numeric are arranged to form a binary host image. Then, N numbers of shares are built up but after stacking all the shares the decoding of the message is achieved by converting ASCII numeric to the secret.
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