On the Analysis and Generalization of Extended Visual Cryptography Schemes
<|reference_start|>On the Analysis and Generalization of Extended Visual Cryptography Schemes: 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].<|reference_end|>
@article{wang2006on,
    title={On the Analysis and Generalization of Extended Visual Cryptography
  Schemes},
    author={DaoShun Wang, Feng Yi, Xiaobo Li, Ping Luo and Yiqi Dai},
    journal={arXiv preprint arXiv:cs/0610172},
    year={2006},
    archivePrefix={arXiv},
    eprint={cs/0610172},
    primaryClass={cs.CR}
}