A Dynamic Security Model for Visual Cryptography and Digital Watermarking

Abstract

This paper proposes a model and algorithm for digital watermarking using visual cryptographic techniques. Initially the visual cryptographic techniques scrambled the secret information into pixelated form, this pixelated secret share does not reveal any key information. This pixelated secret shares are again embedded into invisible digital watermarking with separate covering image for each and every shares. A model and an Algorithm has been proposed based on this techniques, the result has been evaluated and the metrics also calculated. Moreover, our scheme shows better security features compared to the existing techniques.