Re: [Cfrg] 1024 bit RSA

Hanno Böck <hanno@hboeck.de> Sat, 05 November 2016 15:02 UTC

Return-Path: <hanno@hboeck.de>
X-Original-To: cfrg@ietfa.amsl.com
Delivered-To: cfrg@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7B02D1294FB for <cfrg@ietfa.amsl.com>; Sat, 5 Nov 2016 08:02:56 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.601
X-Spam-Level:
X-Spam-Status: No, score=-2.601 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VuIyp76ReAfy for <cfrg@ietfa.amsl.com>; Sat, 5 Nov 2016 08:02:54 -0700 (PDT)
Received: from zucker.schokokeks.org (zucker.schokokeks.org [178.63.68.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7407D1294A1 for <cfrg@irtf.org>; Sat, 5 Nov 2016 08:02:54 -0700 (PDT)
Received: from pc1 ([2001:2012:127:3e00:6167:f9c1:e510:ec40]) (AUTH: LOGIN hanno-default@schokokeks.org, TLS: TLSv1/SSLv3, 256bits, ECDHE-RSA-AES256-GCM-SHA384) by zucker.schokokeks.org with ESMTPSA; Sat, 05 Nov 2016 16:02:53 +0100 id 0000000000000019.00000000581DF49E.000050AE
Date: Sat, 05 Nov 2016 16:02:52 +0100
From: Hanno Böck <hanno@hboeck.de>
To: Erik Andersen <era@x500.eu>
Message-ID: <20161105160252.5b1f2886@pc1>
In-Reply-To: <001501d23769$6c8c1820$45a44860$@x500.eu>
References: <005a01d236b0$4b247470$e16d5d50$@x500.eu> <20161105141754.3d34c2ac@pc1> <001501d23769$6c8c1820$45a44860$@x500.eu>
X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu)
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/cfrg/5TB9u6_DJKwZxaLysdBMvKf6KII>
Cc: Cfrg <cfrg@irtf.org>
Subject: Re: [Cfrg] 1024 bit RSA
X-BeenThere: cfrg@irtf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Crypto Forum Research Group <cfrg.irtf.org>
List-Unsubscribe: <https://www.irtf.org/mailman/options/cfrg>, <mailto:cfrg-request@irtf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/cfrg/>
List-Post: <mailto:cfrg@irtf.org>
List-Help: <mailto:cfrg-request@irtf.org?subject=help>
List-Subscribe: <https://www.irtf.org/mailman/listinfo/cfrg>, <mailto:cfrg-request@irtf.org?subject=subscribe>
X-List-Received-Date: Sat, 05 Nov 2016 15:02:56 -0000

On Sat, 5 Nov 2016 14:35:07 +0100
"Erik Andersen" <era@x500.eu> wrote:

> My best guess is that some vendor with a major voice in the standard
> organizations have products that due to a bad design cannot be easily
> upgraded to a stronger algorithm.

My guess as well. Something very similar happened in the TLS working
group. Some anonymous vendor let us know that we shouldn't enforce
RSA-PSS because they have a large deployment of devices not capable of
doing that. The working group fortunately didn't follow that request.

The very first thing I'd ask for here is transparency: What device,
which vendor, why was it shipped with substandard crypto?


> This proves to me that it wrong to leave the IT standardization to
> vendors.

Well, they should certainly take part in the discussion. But it's
important to communicate to them that:
a) if they ship substandard crypto it's their fault.
b) they should fix their development process to avoid that in the
future.


-- 
Hanno Böck
https://hboeck.de/

mail/jabber: hanno@hboeck.de
GPG: FE73757FA60E4E21B937579FA5880072BBB51E42