Visual Cryptograms of Random Grids for General Access Structures

@article{Shyu2013VisualCO,
  title={Visual Cryptograms of Random Grids for General Access Structures},
  author={Shyong Jian Shyu},
  journal={IEEE Transactions on Circuits and Systems for Video Technology},
  year={2013},
  volume={23},
  pages={414-424}
}
This paper re-examines the problem of visual secret sharing for general access structures by using visual cryptograms of random grids (VCRG). Given a binary or color secret image shared by a set of n participants with a strong access structure, we devise two effective algorithms to produce a set of VCRG so that the members in each qualified set can reconstruct the secret image by superimposing their shares, while those in any forbidden set cannot. Our algorithms do not require any extra pixel… CONTINUE READING
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