libSRTP is the Open Source Secure RTP library from Cisco Systems,
Inc. RTP is the Real-time Transport Protocol, an IETF standard
for the transport of real-time data such as telephony, audio, and
video, defined by RFC 3550. Secure RTP (SRTP) is an RTP profile for
providing confidentiality to RTP data and authentication to the RTP
header and payload. SRTP is an IETF Standard, defined in RFC 3711,
and was developed in the IETF Audio/Video Transport (AVT) Working
Group. This library supports all of the mandatory features of SRTP,
but not all of the optional features.