Description: 这里包含了密码学的详细介绍，以及各种算法，相信对大家一定有用。-here contains detailed cryptography, as well as various algorithms, we believe that certain useful. Platform: |
Size: 735232 |
Author:唐飞 |
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Description: 應用視覺密碼原理之浮水印技術，包含程式碼與原始論文檔-Application of the principle of visual cryptography watermark technology, contains the original code of the document Platform: |
Size: 2778112 |
Author:葉小祥 |
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Description: this a matlab code of the method of visual cryptography based in the shadows method of Visual Cryptography, Moni Naor, Adi Shamir. -this is a matlab code of the method of visual cryptography based in the shadows method of Visual Cryptography, Moni Naor, Adi Shamir. Platform: |
Size: 3072 |
Author:galicianpeople |
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Description: In this IEEE Paper "Visual Cryptography is Solved" in c and MATLAB-In this IEEE Paper "Visual Cryptography is Solved" in c and MATLAB Platform: |
Size: 878592 |
Author:malli |
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Description: Two common drawbacks of the visual cryptography
scheme (VCS) are the large pixel expansion of each share image
and the small contrast of the recovered secret image. In this paper,
we propose a step construction to construct VCS and VCS
for general access structure by applying (2,2)-VCS recursively,
where a participant may receive multiple share images. The proposed
step construction generates VCS and VCS which
have optimal pixel expansion and contrast for each qualified set
in the general access structure in most cases. Our scheme applies
a technique to simplify the access structure, which can reduce the
average pixel expansion (APE) Platform: |
Size: 391168 |
Author:isclor |
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Description: visual cryptography short tutorial.
visual cryptography is used for secured transmission of message over a network. Platform: |
Size: 108544 |
Author:rahul |
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Description: Color visual cryptography (VC) encrypts a color secret message into color halftone image shares. Previous methods in the literature show good results for black and white or gray scale VC schemes, however, they are not sufficient to be applied directly to color shares due to different color structures. Some methods for color visual cryptography are not satisfactory in terms of producing either meaningless shares or meaningful shares with low visual quality, leading to suspicion of encryption. This paper introduces the concept of visual information pixel (VIP) synchronization and error diffusion to attain a color visual cryptography encryption method that produces meaningful color shares with high visual quality. VIP synchronization retains the positions of pixels carrying visual information of original images throughout the color channels and error diffusion generates shares pleasant to human eyes. Comparisons with previous approaches show the superior performance of the new method. Platform: |
Size: 23552 |
Author:shital |
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Description: Visual cryptography is a cryptographic technique which allows visual information (pictures, text, etc.) to be encrypted in such a way that decryption becomes a mechanical operation that does not require a computer. One of the best-known techniques has been credited to Moni Naor and Adi Shamir, who developed it in 1994. Platform: |
Size: 384000 |
Author:rahul |
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Search - cryptography visual