Abstract
In this paper, we analyze the disjunction and the conjunction of two access structures for visual secret sharing schemes. The latter operation, when applied to k-out-of-n schemes, leads to schemes with multiple thresholds. We precisely determine the maximum relative contrast for schemes of this type. As in the case of classical schemes with a single threshold, the analysis proceeds by revealing a central relation between the relative contrast in a visual secret sharing scheme and the error-term in a related problem of approximation-theoretic flavor.
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Simon, H.U. (2012). Boolean Composition of Visual Secret Sharing Schemes. In: Hirsch, E.A., Karhumäki, J., Lepistö, A., Prilutskii, M. (eds) Computer Science – Theory and Applications. CSR 2012. Lecture Notes in Computer Science, vol 7353. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30642-6_29
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DOI: https://doi.org/10.1007/978-3-642-30642-6_29
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-30641-9
Online ISBN: 978-3-642-30642-6
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