Image Steganography: The Main Purpose Of Steganography

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Abstract - The main objective of Steganography is to communicate securely in such a way that the true message is not visible to the observer. Depending on the type of the cover object there are many suitable steganographic techniques which are followed in order to obtain security. The seganographic techniques can be classified as audio, video, text, image and network steganography. In this paper we have analyzed various data hiding techniques in encrypted images.
Keywords: steganography, data hiding, security.
I. INTRODUCTION
In modern time data hiding is associated with digital forms such as cryptography, steganography and watermarking. Fig 1. Steganography Concepts

Cryptography is obscuring the content of the message, but not the communication of the message. Watermarking attempts to add sufficient metadata to a message to establish ownership, provenance, source, etc. The word steganography combines the …show more content…

Such as Audio, Video, Image, Text and Image files. In this paper we focused image stegnography method.
III. IMAGE STEGANOGRAPHY METHODS
Image steganography has been widely studied by researchers. There are a variety of methods used in which information can be hidden in images. In the following section, we present the most common methods. There are three common methods of steganography: Replacing Moderate Significant Bit, Transformation Domain Techniques, and Replacing Least Significant Bit [4].
In this paper we will be presenting the survey of various data hiding techniques in image steganography to facilitate the secure data transmission over the communication channels.
A. LITERATURE SURVEY
Shamin Ahmed Laskar et.al [1] proposed, to encrypt a message using transposition cipher method and then embed the encrypted message inside an image using LSB embedding method. Data hiding using LSB Steganography is described, yi=2| xi/2 |+

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