Re: [TLS] Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt

Stephen Farrell <stephen.farrell@cs.tcd.ie> Tue, 10 July 2018 08:21 UTC

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To: nalini elkins <nalini.elkins@e-dco.com>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Tue, 10 Jul 2018 09:21:04 +0100
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Subject: Re: [TLS] Fwd: New Version Notification for draft-moriarty-tls-oldversions-diediedie-00.txt
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Hi Nalini,

On 10/07/18 04:50, nalini elkins wrote:
> It would be nice to see some of this reflected in the draft rather than
> only statistics on browsers.   The real usage of these protocols is far
> more complex.

I didn't have time before the I-D cutoff but have since
added a section on mail to the repo pre-01 version. (See
[1] section 3.2.) I'd love to add more detail like that
and/or more sections for other protocols if folks have
data to offer with references.

Consistent with other folks' numbers sent to the list
yesterday, (though based on a much smaller sat of data I
guess;-) my data shows 10.6% use of TLSv1.0 when talking
SMTP/IMAP/POP (or HTTP) over TLS to a population of ~200K
IP addresses that listen on port 25 (mail servers).

What I don't currently have is a rate of change for that
figure. I think that rate of change is the important number
for figuring out what to do in the next while. E.g. The
WG might conclude that if the percentage of TLSv1.0 is
moving down nicely, we should be a bit patient. If it's
not moving at all, we can probably move now or in 5 years
without that being different. If we're not sure, then get
more data...

Cheers,
S.

[1]
https://github.com/sftcd/tls-oldversions-diediedie/blob/master/draft-moriarty-tls-oldversions-diediedie.txt