Contrast Optimal XOR Based Visual Cryptographic Schemes

OR-based Visual Cryptographic Schemes (OVCS) suffer from poor visual quality of the reconstructed image. XOR-based visual secret sharing (XVCS) can be thought of as an alternative where the relative contrast of the reconstructed image is much better. Moreover, it is possible to achieve optimum relat...

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Bibliographic Details
Published inInformation Theoretic Security Vol. 10681; pp. 58 - 72
Main Authors Dutta, Sabyasachi, Adhikari, Avishek
Format Book Chapter
LanguageEnglish
Published Switzerland Springer International Publishing AG 2017
Springer International Publishing
SeriesLecture Notes in Computer Science
Subjects
Cumulative array
Equivalent participants
Essential participants
Maximal forbidden sets
Relative contrast
Visual secret sharing scheme
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Summary:OR-based Visual Cryptographic Schemes (OVCS) suffer from poor visual quality of the reconstructed image. XOR-based visual secret sharing (XVCS) can be thought of as an alternative where the relative contrast of the reconstructed image is much better. Moreover, it is possible to achieve optimum relative contrast equal to 1 in XVCS which is an impossibility in case of OVCS. Although there are examples of XVCSs where optimum relative contrast is achieved but to the best of our knowledge, this is the first theoretical work to find a necessary and sufficient condition for a XOR-based VCS to achieve optimum relative contrast equal to 1 in terms of the underlying access structure.
ISBN:9783319720883
3319720880
ISSN:0302-9743
1611-3349
DOI:10.1007/978-3-319-72089-0_4