Visual Cryptography for General Access Structures
نویسندگان
چکیده
منابع مشابه
Visual Cryptography for General Access Structures
A visual cryptography scheme for a set P of n participants is a method to encode a secret image SI into n shadow images called shares, where each participant in P receives one share. Certain quali ed subsets of participants can \visually" recover the secret image, but other, forbidden, sets of participants have no information (in an information-theoretic sense) on SI . A \visual" recovery for a...
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Visual cryptography, first introduced by Naor and Shamir, allows a secret (black and white) image to be encoded and distributed to a set of participants such that certain predefined sets of participants may reconstruct the image without any computation. In 2000, Blundo, De Santis, and Naor introduced a model for grey-level visual cryptography which is a generalization of visual cryptography for...
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In a visual cryptography scheme, a secret image is encoded into n shares, in the form of transparencies. The shares are then distributed to n participants. Qualified subsets of participants can recover the secret image by superimposing their transparencies, but non-qualified subsets of participants have no information about the secret image. Pixel expansion, which represents the number of subpi...
متن کاملEfficient Visual Cryptography for General Access Structures with Stamping and Synthesizing
Visual cryptography is a popular solution for image encryption. The encryption procedure encrypts a image into the so-called shares which are noise-like secure images which can be transmitted or distributed over an untrusted communication channel. Using the properties of the human visual system to force the recognition of a secret message from overlapping shares, the image is decrypted without ...
متن کاملVisual Cryptography for General Access Structure Using Pixel-block Aware Encoding
Multi-pixel encoding is an emerging method in visual cryptography for that it can encode more than one pixel for each encoding run. Nevertheless, in fact its encoding efficiency is still low because of that the encoding length is invariable and very small for each run. This paper presents a novel multi-pixel encoding called pixel-block aware encoding. It scans the secret image by zigzag and per...
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ژورنال
عنوان ژورنال: Information and Computation
سال: 1996
ISSN: 0890-5401
DOI: 10.1006/inco.1996.0076