Cryptology ePrint Archive: Report 2008/535

A Recursive Threshold Visual Cryptography Scheme

Abhishek Parakh and Subhash Kak

Abstract: This paper presents a recursive hiding scheme for 2 out of 3 secret sharing. In recursive hiding of secrets, the user encodes additional information about smaller secrets in the shares of a larger secret without an expansion in the size of the latter, thereby increasing the efficiency of secret sharing. We present applications of our proposed protocol to images as well as text.

Category / Keywords: applications / recursive hiding of secrets, visual cryptography, secret sharing, information efficiency

Date: received 18 Dec 2008

Contact author: parakh at cs okstate edu

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Version: 20081228:085124 (All versions of this report)

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