On the Analysis and Generalization of Extended Visual Cryptography Schemes

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An Extended Visual Cryptography Scheme (EVCS) was proposed by Ateniese et al. [3] to protect a binary secret image with meaningful (innocent-looking) shares. This is implemented by concatenating an extended matrix to each basis matrix. The minimum size of the extended matrix was obtained from a hypergraph coloring model and the scheme was designed for binary images only [3]. In this paper, we give a more concise derivation for this matrix extension for color images. Furthermore, we present a (k, n) scheme to protect multiple color images with meaningful shares. This scheme is an extension of the (n, n) VCS for multiple binary images proposed in Droste scheme [2].

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Cryptography and Security

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http://salesiana.dossiersoluciones.com/handle/123456789/117556

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cs/0610172
 http://arxiv.org/abs/cs/0610172

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arXiv