Uninformed: Informative Information for the Uninformed

Vol 8» 2007.Sep

Audio Codec Conversion

Due to the nature of VoIP, it is not always possible to detect whether or not an audio session such as RTP is terminating at the actual recipient of the call audio or at an intermediary. As such, it is not possible to reliably transmit stego-medium from end to end unless the actual network addresses of each endpoint are known. Due to this limitation, the SteganRTP reference implementation assumes that there are no intermediary devices along the media path making changes to the RTP payload. The reference implementation makes this assumption by also assuming that the sending and receiving applications are either running on the same hosts as the RTP endpoint applications or are along the network path between the two visible RTP endpoints which may or may not be intermediaries. The reference implementation requires that these endpoint network addresses are specified by the user or identified by the RTP session identification component.