|Informative Information for the Uninformed
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One of the most significant challenges to utilizing RTP packet payloads as cover-medium is that RTP generally employs UDP as its underlying transport protocol. This is appropriate for a streaming multimedia protocol, however it is less than ideal for a reliable covert communications channel. UDP is a datagram messaging protocol which is considered connectionless and unreliable. As such, each packet's successful delivery and order of arrival is not guaranteed. Any message data which is split across multiple RTP cover-packets may arrive out of order or not arrive at all.