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how to produce halftone shares?



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how to produce halftone shares?
1 Answer(s)      8 years ago
Posted in : Java Beginners
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January 31, 2009 at 12:56 AM

Hi friend,

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 have no visual meaning, raising the suspicion of data encryption. In order to achieve a higher level of security, halftone visual cryptography was proposed to encode a secret binary image into n halftone shares (images) carrying significant visual information.


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