Biometric privacy using visual cryptography, halftoning and watermarking for multiple secrets

Abstract

It is important to secure the privacy of digital face image that are stored in central database. To impart privacy to such biometric face images, first the digital face image is split into two such that, each of it gives no idea of existence of the original face image and the original image can be retrieved only when both split images available. To achieve this, Visual Cryptography, Halftoning along with Digital Watermarking are employed. The method can be extended to preserve the privacy of a maximum of any n images.

Video data security: analysis, relevance and open challenges

“…It allows two ways of cryptography: symmetric uses the same key for encryption and decryption but asymmetric cryptosystem uses one key (public key) for encryption and another related key for decryption (private key). A digital signature scheme is a special type of asymmetric cryptographic primitive whereas electronic code book mode, cipher feedback mode, feedback chaining cipher mode and counter cipher mode of operation are symmetric cryptographic primitives [5]. Each can be used in wide variety of applications.…”