Secure Media Recording and Transcoding with the Session Initiation Protocol

Document Type Expired Internet-Draft (individual)
Last updated 2008-10-31
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Call recording is an important feature in enterprise telephony applications. Some industries such as financial traders have requirements to record all calls in which customers give trading orders. This poses a particular problem for Secure RTP systems as many SRTP key exchange mechanisms do not disclose the SRTP session keys to intermediate SIP proxies. As a result, these key exchange mechanisms cannot be used in environments where call recording is needed. This document specifies a secure mechanism for a cooperating endpoint to disclose its SRTP master keys to an authorized party to allow secure call recording.


Dan Wing (
Francois Audet (
Steffen Fries (
Hannes Tschofenig (
Alan Johnston (

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