Methods of Audio Steganography

A steganography is a new kind of secret communication used mainly to hide secret data inside other innocent digital mediums. Audio files and signals make appropriate mediums for steganography due to the high data transmission rate and the high level of redundancy. Hiding data in real time communication audio signals is not a simple mission. Steganography requirements as well as real time communication requirements are supposed to be met in order to construct a useful data hiding application. In this paper we will describe various audio steganography techniques. These techniques will be evaluated both, steganography and real time communication requirements.