Re: [openpgp] Fingerprint requirements for OpenPGP

Werner Koch <wk@gnupg.org> Tue, 12 April 2016 19:55 UTC

Return-Path: <wk@gnupg.org>
X-Original-To: openpgp@ietfa.amsl.com
Delivered-To: openpgp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6A95512E373 for <openpgp@ietfa.amsl.com>; Tue, 12 Apr 2016 12:55:29 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.9
X-Spam-Level:
X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5] 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 w5sKyEQVswe4 for <openpgp@ietfa.amsl.com>; Tue, 12 Apr 2016 12:55:27 -0700 (PDT)
Received: from kerckhoffs.g10code.com (kerckhoffs.g10code.com [IPv6:2001:aa8:fff1:100::22]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8757812E0C8 for <openpgp@ietf.org>; Tue, 12 Apr 2016 12:55:27 -0700 (PDT)
Received: from uucp by kerckhoffs.g10code.com with local-rmail (Exim 4.80 #2 (Debian)) id 1aq4PF-0004nu-LN for <openpgp@ietf.org>; Tue, 12 Apr 2016 21:55:25 +0200
Received: from wk by wheatstone.g10code.de with local (Exim 4.84 #3 (Debian)) id 1aq4L8-0000Ba-Uu; Tue, 12 Apr 2016 21:51:10 +0200
From: Werner Koch <wk@gnupg.org>
To: Derek Atkins <derek@ihtfp.com>
References: <87vb3nslqh.fsf@alice.fifthhorseman.net> <sjmbn5e3na2.fsf@securerf.ihtfp.org> <87d1pug303.fsf@wheatstone.g10code.de> <85d83d5bac518c53d7a78d5d049a73ed.squirrel@mail2.ihtfp.org>
Organisation: g10 Code GmbH
X-message-flag: Mails containing HTML will not be read! Please send only plain text.
OpenPGP: url=https://k.gnupg.net/80615870F5BAD690333686D0F2AD85AC1E42B367
Mail-Followup-To: "Derek Atkins" <derek@ihtfp.com>, "Daniel Kahn Gillmor" <dkg@fifthhorseman.net>, "IETF OpenPGP" <openpgp@ietf.org>
Date: Tue, 12 Apr 2016 21:51:10 +0200
In-Reply-To: <85d83d5bac518c53d7a78d5d049a73ed.squirrel@mail2.ihtfp.org> (Derek Atkins's message of "Tue, 12 Apr 2016 13:44:17 -0400")
Message-ID: <87wpo2ehch.fsf@wheatstone.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/sLRxavtheo_hbF11Pxd7Df7io-I>
Cc: IETF OpenPGP <openpgp@ietf.org>, Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Subject: Re: [openpgp] Fingerprint requirements for OpenPGP
X-BeenThere: openpgp@ietf.org
X-Mailman-Version: 2.1.17
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: <https://mailarchive.ietf.org/arch/browse/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: Tue, 12 Apr 2016 19:55:29 -0000

On Tue, 12 Apr 2016 19:44, derek@ihtfp.com said:

> This would fall under an "internal DB Identifier."  DKG called that out of
> scope for this discussion topic.

It is not "internal" because it is part of the OpenPGP protocol
(Signature Packet) and thus visible by all who are verifying a
signature.

I define "internal" as a property of the implementation - maybe this is
the misunderstanding.

> There is no human in the loop here.  That means it does not need to be
> "the same" as the user-visible "fingerprint".

Need not, right.  But adding yet another identifier to a key only leads
to more confusion and more complex error handling.  I do not expect that
you want OpenPGP to repeat the error made by X.509.


Salam-Shalom,

   Werner

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