Securing Multiple Color Secrets Using Visual Cryptography

Abstract

Visual secret sharing is an encryption methodology that allows to retrieve the secret image where the secret image is cryptographically encoded into shares. The (n,n) visual secret sharing scheme proposed by Naor and shamir is used to encrypt the secret image into n shares and by stacking the shares together, the secret is retrieved back. Color visual cryptography deals with color images as secret, where the color secrets are embedded into n shares .In this paper, we propose a (2,2) color visual secret sharing scheme for multiple color secrets based on Wu and Chen's code book. Experimental results show that the proposed methodology retrieves multiple color secrets by stacking under various rotation angles.