ISSN 2250 - 1959 (online) ISSN 2348 - 9367 (Print) New DOI : 10.32804/IRJMST



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EXTENDED VISUAL CRYPTOGRAPHY TECHNIQUES

    1 Author(s):  PRACHI KHOKHAR

Vol -  7, Issue- 1 ,         Page(s) : 8 - 12  (2016 ) DOI : https://doi.org/10.32804/IRJMST

Abstract

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. They demonstrated a visual secret sharing scheme, where an image was broken up into n shares so that only someone with all n shares could decrypt the image, while any n − 1 shares revealed no information about the original image. Each share was printed on a separate transparency, and decryption was performed by overlaying the shares. When all n shares were overlaid, the original image would appear. There are several generalizations of the basic scheme including k-out-of-n visual cryptography

1. M. Naor and A. Shamir. Visual cryptography,advances in cryptology. Eurocrypt’94 Proceeding LNCS, 950:1–12, 1995.
2. M. Naor and A. Shamir. Visual cryptography ii: Improving the contrast via the cover base. Theory of Cryptography Library,(96-07), 1996.
3. http://users.telenet.be/d.rijmenants/en/visualcrypto.htm

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