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IANDC
2007

Extended visual cryptography schemes

13 years 11 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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