Version 0.3 of XEP-0220 (Server Dialback) has been released. Abstract: This specification defines the Server Dialback protocol, which is used between XMPP servers to provide identity verification. Server Dialback uses the Domain Name System (DNS) as the basis for verifying identity; the basic approach is that when a receiving server receives a server-to-server connection request from an originating server, it does not accept the request until it has verified a key with an authoritative server for the domain asserted by the originating server. Although Server Dialback does not provide strong authentication or trusted federation and although it is subject to DNS poisoning attacks, it has effectively prevented most instances of address spoofing on the XMPP network since its development in the year 2000.
Changelog: Completed copy edit; clarified several points in the text; corrected several examples. (psa) Diff: http://is.gd/4co8 URL: http://www.xmpp.org/extensions/xep-0220.html
