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IANDC
2007

Extended visual cryptography schemes

9 years 2 months ago
Extended visual cryptography schemes
Visual cryptography schemes have been introduced in 1994 by Naor and Shamir. Their idea was to encode a secret image into n shadow images and to give exactly one such shadow image to each member of a group P of n persons. Whereas most work in recent years has been done concerning the problem of qualified and forbidden subsets of P or the question of contrast optimizing, in this paper we study extended visual cryptography schemes, i.e. shared secret systems where any subset of P shares its own secret.
Andreas Klein, Markus Wessler
Added 14 Dec 2010
Updated 14 Dec 2010
Type Journal
Year 2007
Where IANDC
Authors Andreas Klein, Markus Wessler
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