Encrypted Key Transport for Secure RTP

Document Type Replaced Internet-Draft (individual)
Last updated 2009-10-26
Replaced by draft-ietf-avt-srtp-ekt
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


SRTP Encrypted Key Transport (EKT) is an extension to SRTP that provides for the secure transport of SRTP master keys, Rollover Counters, and other information, within SRTP or SRTCP. This facility enables SRTP to work for decentralized conferences with minimal control, and to handle situations caused by early media. This note defines EKT, and also describes how to use it with SDP Security Descriptions, DTLS-SRTP Key Transport (KTR), and MIKEY. These other key management protocols provide an EKT key to everyone in a session, and EKT coordinates the keys within the session.


David McGrew (mcgrew@cisco.com)
Flemming Andreasen (fandreas@cisco.com)
Dan Wing (dwing@cisco.com)
Lakshminath Dondeti (ldondeti@qualcomm.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)