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Re: DH group exchange (Re: SSH key algorithm updates)

nisse@lysator.liu.se (Niels Möller ) Mon, 09 November 2015 22:31 UTC

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From: nisse@lysator.liu.se
To: "Mark D. Baushke" <mdb@juniper.net>
Cc: Peter Gutmann <pgut001@cs.auckland.ac.nz>, denis bider <ietf-ssh3@denisbider.com>, Jeffrey Hutzelman <jhutz@cmu.edu>, "ietf-ssh@NetBSD.org" <ietf-ssh@NetBSD.org>, "stephen.farrell@cs.tcd.ie" <stephen.farrell@cs.tcd.ie>, "jon@siliconcircus.com" <jon@siliconcircus.com>
Subject: Re: DH group exchange (Re: SSH key algorithm updates)
References: <9A043F3CF02CD34C8E74AC1594475C73F4B5993D@uxcn10-5.UoA.auckland.ac.nz> <2096379125-720@skroderider.denisbider.com> <9A043F3CF02CD34C8E74AC1594475C73F4B599ED@uxcn10-5.UoA.auckland.ac.nz> <55190.1447001241@eng-mail01.juniper.net>
Date: Mon, 09 Nov 2015 19:26:17 +0100
In-Reply-To: <55190.1447001241@eng-mail01.juniper.net> (Mark D. Baushke's message of "Sun, 8 Nov 2015 08:47:21 -0800")
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"Mark D. Baushke" <mdb@juniper.net> writes:

> I would therefore really like to see it possible to express all of the
> MODP groups via this new extension if possible.

I still think it is inappropriate to use group-exchange for groups that
are going to be widely used. Widely used groups should be subject to
negotiation. Group-exchange should be used only for ephemeral groups
which each server discard before they get "widely used".

Regards,
/Niels

-- 
Niels Möller. PGP-encrypted email is preferred. Keyid C0B98E26.
Internet email is subject to wholesale government surveillance.

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