Plan for moving forward

[Cullen Jennings <fluffy@xxxxxxxxx>]

Hi All,

I have talked to the RAI and SEC ADs and here is the rough plan for  
how I would like to move forward with this. I would like to split the  
work off into the following working groups.

TLS
Make any modifications that may be required to DTLS to allow DTLS to  
generate the keys for SRTP.

AVT
Describe how DTLS is used to key SRTP and how SRTP is used in  
combination with DTLS. This includes the issues of multiplexing DTLS  
and SRTP on one port. draft-mcgrew-tls-srtp will be the starting  
draft for this.

MMUSIC
Provide a scheme for transporting DTLS fingerprints in SDP offer/ 
answer (suspect this is already done but it not, MMUSIC does it).   
Provide a scheme that allow an offer to say it is willing to do SRTP  
or RTP but would prefer SRTP.  The ongoing draft-ietf-mmusic-sdp- 
media-capabilities work should meet this need.

RAI/SEC
Write overview document on how SIP UA can secure media using  
combination of DTLS/SRTP, SDP Fingerprint, Identity, Outbound, and  
Digest and TLS for SIP. This document will not describe new  
mechanisms, it just provides the roadmap of how they all fit  
together. Jon Peterson has the token to start this.


Cullen <with my AD hat on>