[Security] TLS Certificates Verification

Jonathan Dickinson jonathanD at k2.com
Tue Aug 19 16:38:01 CDT 2008

> -----Original Message-----
> From: security-bounces at xmpp.org [mailto:security-bounces at xmpp.org] On
> Behalf Of Dave Cridland
> Sent: Tuesday, August 19, 2008 11:31 PM
> To: XMPP Security
> Subject: Re: [Security] TLS Certificates Verification
> On Tue Aug 19 22:19:31 2008, Jonathan Schleifer wrote:
> > "Eric Rescorla" <ekr at rtfm.com> wrote:
> >
> > There would be several changes needed as already stated on this
> > list. And new XEPs would need to be created. XEPs for stuff for
> > which
> > already XEPs exist. If that's not reinventing, I don't know.

One far-out and crazy problem that we probably need to keep in mind is that this stuff needs to be configurable, and the current XEPs don't really cut it.

"Who cares if it's configurable?" I hear you say. Quantum computers are just around the corner, and we will be sitting here in a few years time coming up with new XEPs to deal with cryptography issues introduced by quantum computers. Rather save ourselves the work now and make sure we can negotiate other ways of encrypting data.

Not only that, but what if someone figures out a blocker with the protocol we decide on? Firstly, if it happens before 3290bis is out we can easily change our direction with a new protocol (for example, SCRAM is found to be fatally flawed). It just keeps us fluid.

> Admittedly, it's painful throwing away that volume of work, but I
> think it's the right choice here.

Well put. Generally agree with Dave (and hence disagree with myself) most of the time.

> Dave.
> --
> Dave Cridland - mailto:dave at cridland.net - xmpp:dwd at dave.cridland.net
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