Re: [openpgp] Followup on fingerprints

Vincent Breitmoser <look@my.amazin.horse> Fri, 07 August 2015 10:06 UTC

Return-Path: <look@my.amazin.horse>
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 22B351B3835 for <openpgp@ietfa.amsl.com>; Fri, 7 Aug 2015 03:06:58 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9] 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 WQ6qho7ZfoBC for <openpgp@ietfa.amsl.com>; Fri, 7 Aug 2015 03:06:56 -0700 (PDT)
Received: from mail.mugenguild.com (mugenguild.com [5.135.189.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 565161B3834 for <openpgp@ietf.org>; Fri, 7 Aug 2015 03:06:55 -0700 (PDT)
Received: from localhost (p57B2C6A4.dip0.t-ipconnect.de [87.178.198.164]) by mail.mugenguild.com (Postfix) with ESMTPSA id 3741D5FCD4; Fri, 7 Aug 2015 12:02:50 +0200 (CEST)
References: <87twsn2wcz.fsf@vigenere.g10code.de> <CAMm+LwgRJX-SvydmpUAJMmN3yysi4zzGSpO2yY4JAMhD-9xLgQ@mail.gmail.com> <87zj2ecmv8.fsf@alice.fifthhorseman.net> <CAMm+LwgKmcTes=V7uS3MjCQixWCo-i7PY=VE7eCHSqt3Ho3OSg@mail.gmail.com> <87a8udd4u6.fsf@alice.fifthhorseman.net> <sjm61503182.fsf@securerf.ihtfp.org> <CAMm+LwgEVySpfL-iN2uzX-4tu7R+isDkHE9D8uAeLTxxd4VxqQ@mail.gmail.com> <sjmwpxc1kbv.fsf@securerf.ihtfp.org> <CAAS2fgR6LYck+km5Ze6S9z65ZgsR61d8md2CqojDaceZ0OrZrw@mail.gmail.com> <9c2c8c5df67c83925d7e3c21fe943483.squirrel@mail2.ihtfp.org> <20150803173231.GG3067@straylight.m.ringlet.net> <2439a89a6c4eb70044e144406a732482.squirrel@mail2.ihtfp.org> <87io8v7uqt.fsf@littlepip.fritz.box> <87h9of7p0e.fsf@littlepip.fritz.box> <87wpxbtuwk.fsf@vigenere.g10code.de> <CAAu18hez49oVhTwRLqv=3rifbg5q5+EqsSvBO0c-ezq+M_Qmyw@mail.gmail.com> <87614u4u7q.fsf@alice.fifthhorseman.net> <55C3836D.2040104@iang.org> <87d1z0763m.fsf@littlepip.fritz.box> <CAAu18hcnjnZjwZn-uPO936CHDABn_HmqOibtsrBC7Ya7b-93Lg@mail.gmai l.com> <87lhdow7gj.fsf@alice.fifthhorseman.net> <CAMm+LwhKfEnRRoWGkR0+AAAd+5CGJa-VKPtyqM53ZVDPEW30TA@mail.gmail.com>
From: Vincent Breitmoser <look@my.amazin.horse>
To: Phillip Hallam-Baker <phill@hallambaker.com>
In-reply-to: <CAMm+LwhKfEnRRoWGkR0+AAAd+5CGJa-VKPtyqM53ZVDPEW30TA@mail.gmail.com>
Date: Fri, 07 Aug 2015 12:06:49 +0200
Message-ID: <878u9n76py.fsf@littlepip.fritz.box>
MIME-Version: 1.0
Content-Type: text/plain
Archived-At: <http://mailarchive.ietf.org/arch/msg/openpgp/RhpyYa0fcuu8ufTTYSrpV3v0--Y>
Cc: "openpgp@ietf.org" <openpgp@ietf.org>
Subject: Re: [openpgp] Followup on 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: <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: Fri, 07 Aug 2015 10:06:58 -0000

On 7 Aug 2015, Phillip Hallam-Baker wrote:

> Here, 100, 125 or 150 bits seem fine for a printed fingerprint and
> 256 bits is comfortable for an internal one. Do we really need to go
> further?

I'm not even sure what an "internal" fingerprint is supposed to be, or
where it is supposed to be used.  A fingerprint is the one true unique
identifier for a key, diverging from this "internally" misses the point
of that.

I also agree with Werner on the aspect that the openpgp rfc should
specify what a fingerprint is purely from a data perspective.  How it is
printed or otherwise represented is not something we should go into
there.

 - V