Cheating prevention in visual cryptography.

Clicks: 194
ID: 23367
2007
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Ranked #41 of 51 articles by views in ieee transactions on image processing : a publication of the ieee signal processing society

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Abstract
Visual cryptography (VC) is a method of encrypting a secret image into shares such that stacking a sufficient number of shares reveals the secret image. Shares are usually presented in transparencies. Each participant holds a transparency. Most of the previous research work on VC focuses on improving two parameters: pixel expansion and contrast. In this paper, we studied the cheating problem in VC and extended VC. We considered the attacks of malicious adversaries who may deviate from the scheme in any way. We presented three cheating methods and applied them on attacking existent VC or extended VC schemes. We improved one cheat-preventing scheme. We proposed a generic method that converts a VCS to another VCS that has the property of cheating prevention. The overhead of the conversion is near optimal in both contrast degression and pixel expansion.
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hu2007cheatingieee Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Hu, Chih-Ming;Tzeng, Wen-Guey;
Journal ieee transactions on image processing : a publication of the ieee signal processing society
Year 2007
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