Results 251 to 260 of about 3,551 (300)

Halftone visual cryptography

Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004
Visual cryptography encodes a secret binary image (SI) into n shares of random binary patterns. If the shares are xeroxed onto transparencies, the secret image can be visually decoded by superimposing a qualified subset of transparencies, but no secret information can be obtained from the superposition of a forbidden subset.
Zhi Zhou, Gonzalo R. Arce, Giovanni Di Crescenzo   +2 more
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A New Approach for Visual Cryptography

Designs, Codes and Cryptography, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wen-Guey Tzeng, Chi-Ming Hu
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Improved Schemes for Visual Cryptography

Designs, Codes and Cryptography, 2001
A visual cryptography scheme (VCS) for a set of \(n\) participants is a technique to encode a secret image into \(n\) shadow images (also called shares or transparencies) where each participant receives one share with the property that certain sets of \(k\) or more of the shares allow the complete visual recovery of the image by stacking the ...
BLUNDO, Carlo, DE BONIS, Annalisa, DE SANTIS, Alfredo   +2 more
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On the Contrast in Visual Cryptography Schemes

Journal of Cryptology, 1999
A visual cryptography scheme (VCS) for a set \(\mathcal{P}\) of \(n\) participants is a method to encode a secret image \(SI\) into shadow images, called shares, where each participant in \(\mathcal{P}\) receives one share. Certain qualified subsets of participants can visually recover the image but other, forbidden sets have no information on the ...
BLUNDO, Carlo, DE SANTIS, Alfredo, STINSON D. R.   +2 more
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Visual Cryptography

2008 International Conference on Advanced Computer Theory and Engineering, 2008
In this paper, we propose a Visual Cryptographic system which can be used to hide the original image information from an intruder or an unwanted user. The images can be in any standard format. The encrypted image is sent to the destination through the network and then the image is decrypted. We have used Symmetric-key cryptography.
null Ashutosh, Sayan Dev Sen
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Probabilistic Visual Cryptography Schemes

The Computer Journal, 2005
Visual cryptography schemes allow the encoding of a secret image, consisting of black or white pixels, into n shares which are distributed to the participants. The shares are such that only qualified subsets of participants can 'visually' recover the secret image.
Stelvio Cimato, Roberto De Prisco, Alfredo De Santis   +2 more
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Randomness in Visual Cryptography

2000
A visual cryptography scheme for a set P of n participants is a method to encode a secret image into n shadow images called shares each of which is given to a distinct participant. Certain qualified subsets of participants can recover the secret image, whereas forbidden subsets of participants have no information on the secret image.
DE BONIS, Annalisa, DE SANTIS, Alfredo
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Visual Cryptography Based Watermarking

2014
The combination of watermarking schemes with visual cryptography has been recently used for the copyright protection of digital images. The derived schemes try to satisfy the increasing need for the security of multimedia data, caused in turn by the enormous amount of digital information that is daily created and distributed over different kinds of ...
Stelvio Cimato, James C. N. Yang, Chih-Cheng Wu   +2 more
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Visual cryptography via halftoning

SPIE Proceedings, 2003
Visual cryptography encodes a secret binary image SI into n shares of random binary patterns. The secret image can be visually decoded by superimposing a qualified subset of shares, but no secret information can be obtained from the superposition of a forbidden subset. Such a scheme is mathematically secure, however, the binary patterns of the n shares
Gonzalo R. Arce, Zhi Zhou, Giovanni Di Crescenzo   +2 more
openaire   +1 more source

Visual cryptography: A brief survey

Information Security Journal: A Global Perspective, 2017
Visual cryptography is an emerging technology to address the concerns regarding privacy of images.
P. Punithavathi, S. Geetha 0001
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