[xmppwg] New charter please
stpeter at stpeter.im
Mon Mar 30 17:54:37 CDT 2009
So, incorporating everything in one place, here is what I have in my
Extensible Messaging and Presence Protocol (xmpp2)
General Discussion:xmppwg at xmpp.org
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Description of Working Group:
The Extensible Messaging and Presence Protocol (XMPP) is an IETF
technology for the near-real-time exchange of messages and presence
notifications, where data is exchanged over Extensible Markup Language
(XML) streams. XMPP was originally formalized by the XMPP Working Group
in 2002-2004, resulting in publication of RFCs 3920-3923.
Implementation and deployment experience since that time has resulted in
errata, clarifications, and suggestions for improvement to the core XMPP
specifications (RFCs 3920 and 3921). Furthermore, some technologies on
which XMPP depends have also undergone modification. The documents
draft-saintandre-rfc3920bis-* and draft-saintandre-rfc3921bis-* reflect
this work but need to be completed by the group. It is envisioned that
these specifications will be recycled at Proposed Standard because of an
accumulation of small changes and improvements.
Although RFC 3923 defines an end-to-end signing and encryption technology
for use by XMPP systems, to date it has not been implemented. A goal of
the group is to develop an implementable method for end-to-end encryption,
preferably based on well known and widely deployed security technologies.
XMPP uses TLS for encryption and the Simple Authentication and Security
Layer (SASL) for authentication. In the case of a server-to-server
stream, XMPP is deployed using TLS and the SASL EXTERNAL mechanism,
where each peer presents an X.509 certificate. This model introduces
scaling challenges in multi-domain deployments because RFC 3920 requires
that a stream cannot be reused for more than one domain, thus
necessitating multiple TCP connections. The group will work to overcome
these challenges by defining an optional mechanism for using a single
connection with multiple identities. It is anticipated that most of the
work will consist of defining and providing requirements to the TLS and
SASL working groups.
Many of the core and extended features of XMPP have also been
implemented in technologies based on the Session Initiation Protocol
(SIP). To ensure interworking between XMPP systems and SIP systems, a
number of Internet-Drafts (draft-saintandre-sip-xmpp-*) have been
produced. The group will define a framework within which this work could
In completing its work, the group will strive to retain backwards
compatibility with RFCs 3920 and 3921. However, changes that are not
backwards compatible might be accepted if the group determines that the
changes are required to meet the group's technical objectives and the
group clearly documents the reasons for making them.
Goals and Milestones:
- Deliver rfc3920bis and rfc3921bis to the IESG.
- Decide upon a direction for end-to-end encryption.
- Decide upon a direction for server-to-server connection reuse.
- Define a framework for SIP-XMPP interworking.
- Define a solution for end-to-end encryption.
- Define a solution for server-to-server connection reuse.
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