  Steganography is the technique of hiding confidential information within any
media. Steganography is often confused with cryptography because the two are
similar in the way that they both are used to protect confidential information.
The difference between the two is in the appearance in the processed output;
the output of steganography operation is not apparently visible but in
cryptography the output is scrambled so that it can draw attention. Steganlysis
is process to detect of presence of steganography. In this article we have
tried to elucidate the different approaches towards implementation of
steganography using 'multimedia' file (text, static image, audio and video) and
Network IP datagram as cover. Also some methods of steganalysis will be
discussed.
