Hi Christer, "DTLS Keying for SRTP" is the other method for in-band key negotiation:http://scm.sipfoundry.org/rep/ietf-drafts/ekr/draft-mcgrew-dtls- srtp.html
Its not an official Internet Draft yet, which is an oversight on my part (it was written during the draft blackout period at Dallas).
EKT is also in-band, but it is not a key negotiation protocol. David On Apr 18, 2006, at 2:15 AM, Christer Holmberg ((JO/LMF)) wrote:
Hi,I don't limit this to just SIP, however, as, unfortunately, the wholeworld does not use SIP. I believe these requirements are moving us towards theone keying method we have not tried yet - inband keying.Something like ZRTP? Regards, Christer