IMPLEMENTATION OF AUDIO STEGANOGRAPHY USING LSB TECHNIQUE

Steganographyis a technique of sending hidden data or secret messages over a public channel so that nobody can detect the presence of the secret messages.Speech signal can be used as a cover signal to hide very sensitive data in it. The proposed approach is criticalin military-warfare conditions, and in the defense related Information Communication. The covert nature is the desirable feature which declines any unauthorized user from getting sensitive information[1]. Steganography is a way of concealing data where secret messages are hidden inside computer files such as images, sound files, video files so that, no one except the sender and the receiver will guess the existence of information in it. Cryptography may also use in steganographywhere the message is first encrypted before it is hidden in another file. Generally, the messages appear like an image, sound or video so that the secret data transfer remains unsuspected.Steganography hides all evidence regarding the existence of communication. A simple technique which involves the embedding of information in the least significant bits of the cover-audio file is known as LSB Encoding Technique. Distortion will be minimum in this technique. The strength of steganography is in hiding the secret message by obscurity, hiding its existence in a non-secret file. The success of this technique depends on the ability to hide the message such that nobody would suspect it, the greatest effort must be to ensure that the message is not visible unless one knows what to look for