Review Based on Visual Cryptographic Scheme and Applications

Abstract

Technologies demand more security and less computation. Visual cryptography is a powerful encoding technique that divides the secret image into multiple shares. Decryption Is performed just by a human visual eye without complex mathematical operations and extra hardware. This review paper covers some visual cryptography techniques overview and lacks some visual cryptography techniques. Analysis of some visual secret-sharing schemes enlightens the new researcher about problem identification, and research gaps for using techniques to their application. Visual cryptography enhanced the applicability of old visual cryptography schemes through different application areas such as image encryption, data hiding, verification or authentication, access control, etc. This paper also enlightens about different enrichment in existing algorithm complexity, pixel expansion, multi-secret encoding, and progressive VC code book