Re: [openpgp] Fingerprints

Werner Koch <wk@gnupg.org> Mon, 13 April 2015 07:46 UTC

Return-Path: <wk@gnupg.org>
X-Original-To: openpgp@ietfa.amsl.com
Delivered-To: openpgp@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CEFE61A1BFF for <openpgp@ietfa.amsl.com>; Mon, 13 Apr 2015 00:46:38 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.2
X-Spam-Level:
X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_50=0.8, RCVD_IN_DNSWL_HI=-5] autolearn=ham
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 aNAmjuaxLgDE for <openpgp@ietfa.amsl.com>; Mon, 13 Apr 2015 00:46:36 -0700 (PDT)
Received: from kerckhoffs.g10code.com (kerckhoffs.g10code.com [217.69.77.222]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C02B61A1EED for <openpgp@ietf.org>; Mon, 13 Apr 2015 00:46:36 -0700 (PDT)
Received: from uucp by kerckhoffs.g10code.com with local-rmail (Exim 4.80 #2 (Debian)) id 1YhZ4l-00044U-3u for <openpgp@ietf.org>; Mon, 13 Apr 2015 09:46:35 +0200
Received: from wk by vigenere.g10code.de with local (Exim 4.84 #3 (Debian)) id 1YhYzz-0002rO-3p; Mon, 13 Apr 2015 09:41:39 +0200
From: Werner Koch <wk@gnupg.org>
To: Tom Ritter <tom@ritter.vg>
References: <CAMm+LwhbB+-MnGRBCvprgAGOuu+5CJ2rgod7EBGOQR5UNVrspQ@mail.gmail.com> <87y4m0ozlt.fsf@vigenere.g10code.de> <sjmk2xkf2t8.fsf@securerf.ihtfp.org> <CA+cU71=M2JzBkJXgUYCgp=Q=0c_7UuZWY14myA6cpMRwKt+Hjg@mail.gmail.com>
Organisation: g10 Code GmbH
X-message-flag: Mails containing HTML will not be read! Please send only plain text.
OpenPGP: id=F2AD85AC1E42B367; url=finger:wk@g10code.com
Mail-Followup-To: Tom Ritter <tom@ritter.vg>, Derek Atkins <derek@ihtfp.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, Phillip Hallam-Baker <phill@hallambaker.com>, "openpgp\@ietf.org" <openpgp@ietf.org>
Date: Mon, 13 Apr 2015 09:41:38 +0200
In-Reply-To: <CA+cU71=M2JzBkJXgUYCgp=Q=0c_7UuZWY14myA6cpMRwKt+Hjg@mail.gmail.com> (Tom Ritter's message of "Sun, 12 Apr 2015 22:11:56 -0500")
Message-ID: <87sic4jwzx.fsf@vigenere.g10code.de>
User-Agent: Gnus/5.13 (Gnus v5.13)
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Archived-At: <http://mailarchive.ietf.org/arch/msg/openpgp/CzWie2xu1G5zLCtrz--UhU6bdpg>
Cc: "openpgp@ietf.org" <openpgp@ietf.org>, Phillip Hallam-Baker <phill@hallambaker.com>, Derek Atkins <derek@ihtfp.com>, Stephen Farrell <stephen.farrell@cs.tcd.ie>
Subject: Re: [openpgp] Fingerprints
X-BeenThere: openpgp@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: "Ongoing discussion of OpenPGP issues." <openpgp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/openpgp>, <mailto:openpgp-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/openpgp/>
List-Post: <mailto:openpgp@ietf.org>
List-Help: <mailto:openpgp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/openpgp>, <mailto:openpgp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Apr 2015 07:46:39 -0000

On Mon, 13 Apr 2015 05:11, tom@ritter.vg said:

> Well, say we choose SHA-3, and say Algorithm 1 is SHA-3.  In 5 years,
> where we learned our lesson and want to hash a different set of data
> for the fingerprint, but SHA-3 is still fine, wouldn't that be a
> problem?

That would require a new key packet format anyway and any old key can't
be used with that.


Shalom-Salam,

   Werner

-- 
Die Gedanken sind frei.  Ausnahmen regelt ein Bundesgesetz.