Search results
Results from the WOW.Com Content Network
But if one of the two shares is structured recursively, the efficiency of visual cryptography can be increased to 100%. [5] Some antecedents of visual cryptography are in patents from the 1960s. [6] [7] Other antecedents are in the work on perception and secure communication. [8] [9] Visual cryptography can be used to protect biometric ...
visual cryptography 3 choose 2: Image title: A visual cryptography method allowing any two transparencies printed with black rectangles to be overlaid to reveal a secret message (here, a letter A) by CMG Lee. Width: 100%: Height: 100%
Isogeny-based cryptography; References This page was last edited on 4 January 2025, at 10:15 (UTC). Text is available under the Creative Commons Attribution ...
When all n shares were overlaid, the original image would appear. There are several generalizations of the basic scheme including k-out-of-n visual cryptography, [18] [19] and using opaque sheets but illuminating them by multiple sets of identical illumination patterns under the recording of only one single-pixel detector. [20]
There are several types of secret sharing schemes. The most basic types are the so-called threshold schemes, where only the cardinality of the set of shares matters. In other words, given a secret S, and n shares, any set of t shares is a set with the smallest cardinality from which the secret can be recovered, in the sense that any set of t − 1 shares is not enough to give S.
In set theoretic terms they are referred to as qualified sets; in turn, the set of all such qualified sets is called the access structure of the system. Less formally it is a description of who needs to cooperate with whom in order to access the resource. In its original use in cryptography, the resource was a secret shared among the ...
Matt Blaze is an American researcher who focuses on the areas of secure systems, cryptography, and trust management. He is currently the McDevitt Chair of Computer Science and Law at Georgetown University , [ 2 ] [ 4 ] and is on the board of directors of the Tor Project .
visual cryptography stenography: Image title: Creation of masks to let overlaying transparencies A and B printed with black rectangles reveal a secret image by CMG Lee. Each corresponding pixel in the component images is randomly rotated to avoid orientation leaking information about the secret image. Width: 100%: Height: 100%