In this modern era, we people make extremely use of gadgets for sharing of data like of images, songs or any document file but still we are unaware about some facts. You ever thought that you can insert a file in an image? The answer is ‘YES’. You can. From past few years in the world of crime there is a huge extended discussion on ‘STEGANOGRAPHY’ especially when terrorists started making use of steganography in their attacks. It is nothing but a sending of a secret message in encrypted form in images, audio, file, etc. This technique is tremendously used by terrorists so that the transfer of their secret data remains unsuspected. It is mainly used to hide send of confidential data during transmission and other won’t able to get access to the hidden file. We all know the story about ‘WORLD TRADE CENTRE’ (WTC), where al-Queda hijacked a plane and crashed it over WTC. In that case, al-Queda made use of steganography technique by sending ‘hiding maps and photographs of terrorist and instructions for terrorist activities in pornographic form’. If there’s one thing the FBI hates more than Osama bin Laden, it’s when Osama bin Laden starts using the Internet. For example, if two parties wants to exchange a confidential information and they want that no one should get an idea about this but even if the third party get access to their information, they may see a file or image but not able to collect the hidden data due to copyright protection. The Steganography can be used for different purposes, some good or some bad. But its not to easy for an average person to detect a steganography file. The technology may be easy to use but difficult to detect. Really, difficult.