[dane] Feature creep for draft-ietf-dane-smime

Paul Hoffman <paul.hoffman@vpnc.org> Fri, 07 February 2014 01:27 UTC

Return-Path: <paul.hoffman@vpnc.org>
X-Original-To: dane@ietfa.amsl.com
Delivered-To: dane@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9B0BD1A0587 for <dane@ietfa.amsl.com>; Thu, 6 Feb 2014 17:27:00 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.347
X-Spam-Level:
X-Spam-Status: No, score=-1.347 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_MISMATCH_COM=0.553] autolearn=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 Sya_sXI3rCKr for <dane@ietfa.amsl.com>; Thu, 6 Feb 2014 17:26:59 -0800 (PST)
Received: from hoffman.proper.com (IPv6.Hoffman.Proper.COM [IPv6:2605:8e00:100:41::81]) by ietfa.amsl.com (Postfix) with ESMTP id CD69C1A03FD for <dane@ietf.org>; Thu, 6 Feb 2014 17:26:59 -0800 (PST)
Received: from [10.20.30.90] (50-1-98-67.dsl.dynamic.sonic.net [50.1.98.67]) (authenticated bits=0) by hoffman.proper.com (8.14.7/8.14.7) with ESMTP id s1716rPC093052 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO) for <dane@ietf.org>; Thu, 6 Feb 2014 18:06:55 -0700 (MST) (envelope-from paul.hoffman@vpnc.org)
X-Authentication-Warning: hoffman.proper.com: Host 50-1-98-67.dsl.dynamic.sonic.net [50.1.98.67] claimed to be [10.20.30.90]
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Mac OS X Mail 7.1 \(1827\))
From: Paul Hoffman <paul.hoffman@vpnc.org>
In-Reply-To: <07a801cf23a1$a5b62c00$f1228400$@augustcellars.com>
Date: Thu, 6 Feb 2014 17:26:55 -0800
Content-Transfer-Encoding: quoted-printable
Message-Id: <E52467C0-3B6A-45D6-AFAB-6A103E587350@vpnc.org>
References: <41938fd202ba460285b59132c29ac826@BY2PR09MB029.namprd09.prod.outlook.com> <20140206195322.GD278@mournblade.imrryr.org> <11698F58-B554-4CC8-872F-D2A3BF08986C@kirei.se> <20140206215742.GF278@mournblade.imrryr.org> <07a801cf23a1$a5b62c00$f1228400$@augustcellars.com>
To: "<dane@ietf.org>" <dane@ietf.org>
X-Mailer: Apple Mail (2.1827)
Subject: [dane] Feature creep for draft-ietf-dane-smime
X-BeenThere: dane@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DNS-based Authentication of Named Entities <dane.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dane>, <mailto:dane-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/dane/>
List-Post: <mailto:dane@ietf.org>
List-Help: <mailto:dane-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dane>, <mailto:dane-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 07 Feb 2014 01:27:00 -0000

Why are we trying to make the names any more difficult to walk through than they would be for SMTP? The use of the hash was *purely* to allow longer LHSs, not to prevent enumeration. Enumeration has never been considered a serious problem for SMTP, and we should not be complicating our protocol to prevent it. Hash-of-LHS is simple and not prone to any misunderstanding.

--Paul Hoffman