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Threshold visual secret sharing by random grids
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DOI：10.1016/j.jss.2011.02.023.png)
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摘要
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A new visual secret sharing (VSS) approach by random grids (RG-based VSS), proposed by Kafri and Keren (1987), has drawn close attention recently. With almost all advantages of visual cryptography-based VSS, RC-based VSS benefits more from keeping the same size of secret images without the problem of pixel expansion from which VC-based VSS suffer. In this paper, a threshold RC-based VSS scheme aiming at providing the wide-use version is presented. This is the first effort to develop the technique. The experimental results and theoretically analysis in visual quality and security show that the proposed scheme performs well. (C) 2011 Elsevier Inc. All rights reserved.
Keyword:
Random grid
Visual secret sharing
Visual cryptography
Threshold
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