Re: [TLS] draft-green-tls-static-dh-in-tls13-01

Colm MacCárthaigh <colm@allcosts.net> Sun, 16 July 2017 09:04 UTC

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From: =?UTF-8?Q?Colm_MacC=C3=A1rthaigh?= <colm@allcosts.net>
Date: Sun, 16 Jul 2017 02:04:32 -0700
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To: "Salz, Rich" <rsalz@akamai.com>
Cc: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "tls@ietf.org" <tls@ietf.org>, Matthew Green <matthewdgreen@gmail.com>
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Subject: Re: [TLS] draft-green-tls-static-dh-in-tls13-01
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On Sun, Jul 16, 2017 at 1:52 AM, Salz, Rich <rsalz@akamai.com>; wrote:

> I would also like to understand why TLS 1.2 is not sufficient for, say,
> the next five years.
>

It probably is ... but isn't that the problem? If the answer is "Just let
them stay on TLS1.2", I find it very hard to interpret the arguments
against all of this as resulting in anything other than grand-standing.
Clearly the users would be no better off, and also end up denied the other
benefits of TLS1.3.

This seems self-defeating, when there is so easy a path that may improve
things for all cases (forbid static-DH, add an opt-in mechanism instead).

-- 
Colm