JES_V4_N3_RevP1 E. SabariNathan E. Manoj Journal on Embedded Systems 2278 - 7895 4 3 31 37 Watermarking, Information Hiding, Steganography, Cryptography High speed computer networks, the Internet and the World Wide Web have developed the way in which digital data is dispersed. The extensive and informal entrees to hypermedia fillings and prospect to make limitless reproduction, deprived of loss of substantial loyalty, have interested the vital for a numerical privileges organization. The extensive use of the Internet and World Wide Web has altered the way digital data is felt. The tranquil entree of images, musical leaflets and movies has adapted the growth of data hiding, by insertion with importance on copyright protection, contentbased authentication, tamper proofing, annotation and covert communication. Data hiding deals with the capability of embedding data into a digital cover with a least amount of perceivable dilapidation, i.e., the entrenched data is invisible or inaudible to a mortal spectator. This paper is a full review of miscellaneous image processing approaches and huge number of interconnected solicitations. In this paper, the dissimilar present methods are deliberated with the problems of the current system and also has elucidated their forthcoming scope. August - October 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=4897