Date Added: May 2012
People use cryptography to send secret messages to one another without a third party overseeing the message. Steganography is a type of cryptography in which the secret message is hidden in another message. In this paper, a method of hiding the speech signal inside a music file using LSB coding is proposed. The speech signal can be hidden inside music file by replacing the LSBs of the samples of music file by speech signal bits. At the receiver's end, speech signal can be heard only when a pre-defined password or codeword is entered by the receiver. Otherwise, a person can only hear the music file which covers the speech signal.