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IPL
2000

Visual cryptography for grey level images

13 years 11 months ago
Visual cryptography for grey level images
Visual cryptography is a cryptographic paradigm introduced by Naor and Shamir [Lecture Notes in Comput. Sci., Vol. 950, Springer, Berlin, 1995, p. 1]. Some predefined set of participants can decode a secret message (a black and white image) without any knowledge of cryptography and without performing any cryptographic computation: Their visual system will decode the message. In this paper we define and analyze visual cryptography schemes for grey level images whose pixels have g grey levels ranging from 0 (representing a white pixel) to g - 1 (representing a black pixel). Moreover, we give a necessary and sufficient condition for such schemes to exist.
Carlo Blundo, Alfredo De Santis, Moni Naor
Added 18 Dec 2010
Updated 18 Dec 2010
Type Journal
Year 2000
Where IPL
Authors Carlo Blundo, Alfredo De Santis, Moni Naor
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