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Re: I-D ACTION:draft-zimmermann-avt-zrtp-03.txt
On 9 Mar 2007, at 18:37, Alan Johnston wrote:
Richard Barnes wrote:
Perhaps. In order to do this you must know that you will do no
harm, i.e. not cause UAs to crash and burn. We have carefully
developed this approach in ZRTP and tested it at SIPits to ensure
that it works.
3. Best Effort SRTP. Only ZRTP supports best effort SRTP
natively. DTLS-SRTP relies on the still being developed MMUSIC
SDP extensions for this to work. ZRTP can be, and is being,
deployed today as a result.
I think this is another instance where there's not a technical
barrier, it's just something that hasn't been done. All the ZRTP
discovery mechanism entails is sending a ZRTP message to an
endpoint with unknown support. This doesn't seem incompatible
with DTLS -- just do the same thing a ClientHello message.
Do you have statistics on the number of implementations which cope
with packets containing an RTP header extension, yet fail the
simplest packet validity check?