IETF Logo Mail Archive

Re: [dane] I-D Action: draft-ietf-dane-smime-03.txt

Paul Wouters <paul@cypherpunks.ca> Fri, 07 February 2014 17:57 UTC

Return-Path: <paul@cypherpunks.ca>
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 BA1221A03F1 for <dane@ietfa.amsl.com>; Fri, 7 Feb 2014 09:57:11 -0800 (PST)
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 fJ5iWTlnoRMq for <dane@ietfa.amsl.com>; Fri, 7 Feb 2014 09:57:10 -0800 (PST)
Received: from bofh.nohats.ca (bofh.nohats.ca [76.10.157.69]) by ietfa.amsl.com (Postfix) with ESMTP id 797971A03E1 for <dane@ietf.org>; Fri, 7 Feb 2014 09:57:10 -0800 (PST)
Received: from bofh.nohats.ca (bofh.nohats.ca [127.0.0.1]) by bofh.nohats.ca (Postfix) with ESMTP id CA3A9800AA for <dane@ietf.org>; Fri, 7 Feb 2014 12:57:09 -0500 (EST)
Received: from localhost (paul@localhost) by bofh.nohats.ca (8.14.7/8.14.7/Submit) with ESMTP id s17Hv9hK017564 for <dane@ietf.org>; Fri, 7 Feb 2014 12:57:09 -0500
X-Authentication-Warning: bofh.nohats.ca: paul owned process doing -bs
Date: Fri, 07 Feb 2014 12:57:09 -0500
From: Paul Wouters <paul@cypherpunks.ca>
X-X-Sender: paul@bofh.nohats.ca
To: dane WG list <dane@ietf.org>
In-Reply-To: <20140206215742.GF278@mournblade.imrryr.org>
Message-ID: <alpine.LFD.2.10.1402071254350.21252@bofh.nohats.ca>
References: <41938fd202ba460285b59132c29ac826@BY2PR09MB029.namprd09.prod.outlook.com> <20140206195322.GD278@mournblade.imrryr.org> <11698F58-B554-4CC8-872F-D2A3BF08986C@kirei.se> <20140206215742.GF278@mournblade.imrryr.org>
User-Agent: Alpine 2.10 (LFD 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; format="flowed"; charset="US-ASCII"
Subject: Re: [dane] I-D Action: draft-ietf-dane-smime-03.txt
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 17:57:11 -0000

On Thu, 6 Feb 2014, Viktor Dukhovni wrote:

> I think that HMAC-sha224 would be wiser, since otherwise a single
> dictionary works for all domains.

So what, telnet'ing to port 25 and issuing HELO and RCP TO: is cheaper
already.

As PaulH said, this is not a security feature - it's only meant as a
method to be able to store any LHS username in DNS.

Straight sha224, no hmac.

Paul

v2.23.0 | Report a Bug | By Email