標題: | Cheating prevention in visual cryptography |
作者: | Hu, Chih-Ming Tzeng, Wen-Guey 資訊工程學系 Department of Computer Science |
關鍵字: | cheat-preventing;cheating;secret sharing;visual cryptography |
公開日期: | 1-一月-2007 |
摘要: | 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. |
URI: | http://dx.doi.org/10.1109/TIP.2006.884916 http://hdl.handle.net/11536/11321 |
ISSN: | 1057-7149 |
DOI: | 10.1109/TIP.2006.884916 |
期刊: | IEEE TRANSACTIONS ON IMAGE PROCESSING |
Volume: | 16 |
Issue: | 1 |
起始頁: | 36 |
結束頁: | 45 |
顯示於類別: | 期刊論文 |