A Comprehensive Study on Text and Image Stegnography

ABSTRACT Stegnography is the process of hiding data behind some form of multimedia file or network protocol. Stegnography can be categorized as follows based on the medium in which we are hiding the data i.e Text,Image,Audio,Video and Network Protocol and is referred to as Text Stegnography,Image Stegnography,Audio Stegnography Video Stegnography and Network or Protocol Stegnography respectively.This paper presents a review on the work done on Image and Text Stegnography and apart from this Stegnography advantages and disadvantages are also discussed. Keywords:-Cover, Stego, Pure ,Secret and Public Key Stegnography.