An Extensive Survey on Image Steganography

In the last few time, we have seen a lot of new and powerful steganography techniques. In the subsequent paper we go over some general concepts and thoughts that are appropriate toward steganography. Specifically we found a structure and define idea of security for a steganography system and illustrate how conventional definitions do not really sufficiently cover image steganography and an offer alternating definitions. Also review on some of the latest image steganography techniques. In this paper we discuss about the how to secure image steganography (Covered Writing) technique to hide a secret image using the key. The covert image itself is not secret, instead a key is generated and the key is hidden in the cover image. Using the key the secret image can be extracted. So it is very safe and robust because no one can recognize the hidden information and it cannot be vanished due to noise or any signal processing operations.