Hiding Secret Audio Message Inside Smaller Size Audio Cover

Abstract

Information hiding techniques have recently become important in a number of application areas. Information hiding and cryptography are cousins in the secrecy family. Information can be hidden many different ways in audio. But, most of these ways suffer from the suitable choice of the message (and\or) cover size. Nearly, all hiding techniques can not hide audio message in smaller audio cover. Therefore, this paper presents proposed system that capable from solving this problem. The proposed system depends on two main ideas. First idea is wavelet compression for secret audio message. This idea converts the secret audio message to half size at least. The second idea is masking steganography for the compressed secret audio message. This idea has the ability to hide an audio message in similar size audio cover. These two ideas are applied in transmitter side, in order to obtain the audio stegocover that hide message of double size larger than the cover. However, the reverse of these processes are applied in receiver side, in order to decompress\ extract the secret audio message.