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IJSTR >> Volume 5 - Issue 1, January 2016 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

An Efficient Interception Mechanism Against Cheating In Visual Cryptography With Non Pixel Expansion Of Images

[Full Text]



Linju P.S, Sophiya Mathews



Cheating, Cover image, Halftone image, Pixel expansion, Sealing



Visual cryptography is a technique of cryptography in which secret images are divided into multiple shares and are distributed to different entities. Each secret can be reconstructed by superimposing these shares using different operations. Common traditional drawbacks of all existing methods are pixel expansion and noise at output. Another major issues that can occur in existing visual cryptography systems are Cheating between share holders and Share holders cheating owner. In order to overcome these limitations, sealing algorithm is used with two applications of VC such as MIVC and EVC. Here two secret images can be send at the same time by converting them to halftone representations which in turn are partitioned as three shares in total.



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