ABSTRACT
This chapter provides the need for a hybrid approach and presents the basic development of a hybrid approach. It explores the efficient algorithm using different combinations of image-based security techniques and details the MATLAB code for the implementation of the approaches. Hybrid approaches for image security are nothing but the combinations of two or more existing image-based security techniques like visual cryptography (VC), watermarking and steganography. Embedding of a textual message is more space effective than a large document (binary) image. A small secret message can be embedded into multiple locations of the spatial domain of the cover image. Steganography over watermarking can reduce the imperceptibility of the watermarked image. By embedding the fragile watermark into halftone shares, the contrast of the recovered secret may decrease. A single pixel of the share will contain both types of information: secret image and copyright logo.
