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Title : ZRTP: Media Path Key Agreement for Secure RTP
Author(s) : P. Zimmermann, et al.
Filename : draft-zimmermann-avt-zrtp-04.txt
Pages : 61
Date : 2007-7-10
This document defines ZRTP, a protocol for media path Diffie-Hellman
exchange to agree on a session key and parameters for establishing
Secure Real-time Transport Protocol (SRTP) sessions. The ZRTP
protocol is media path keying because it is multiplexed on the same
port as RTP and does not require support in the signaling protocol.
ZRTP does not assume a Public Key Infrastructure (PKI) infrastructure
or require the complexity of certificates in end devices. For the
media session, ZRTP provides confidentiality, protection against Man
in the Middle (MITM) attacks, and, in cases where a secret is
available from the signaling protocol, authentication. ZRTP can
utilize two Session Description Protocol (SDP) attributes to provide
discovery and authentication through the signaling channel. To
provide best effort SRTP, ZRTP utilizes normal RTP/AVP profiles.
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