The IESG has approved the Internet-Draft 'Security Mechanism Agreement for SIP Sessions' <draft-ietf-sip-sec-agree-05.txt> as a Proposed Standard. This document is the product of the Session Initiation Protocol Working Group. The IESG contact persons are Allison Mankin and Scott Bradner. Technical Summary The SIP protocol does not currently provide any good mechanism for negotiating which security mechanism to use between two SIP entities. This document fills that hole by defining three header fields for negotiating the SIP security mechanism to be used between a SIP entity and its next SIP hop. A SIP entity applying this mechanism must always require some minimum security (i.e. integrity protection) from all communicating parties in order to secure the negotiation, but the negotiation can agree on which specific minimum security is used. Working Group Summary The SIP working group supported publication of this document. Protocol Quality This document was reviewed for the IESG by Allison Mankin
