Re: [keyassure] PKIX/KIDNS validation results and draft-hoffman-keys-linkage-from-dns

Paul Hoffman <paul.hoffman@vpnc.org> Wed, 03 November 2010 17:47 UTC

Return-Path: <paul.hoffman@vpnc.org>
X-Original-To: keyassure@core3.amsl.com
Delivered-To: keyassure@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id E1FD83A6AD7 for <keyassure@core3.amsl.com>; Wed, 3 Nov 2010 10:47:44 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -100.185
X-Spam-Level:
X-Spam-Status: No, score=-100.185 tagged_above=-999 required=5 tests=[AWL=0.002, BAYES_20=-0.74, HELO_MISMATCH_COM=0.553, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VDvEI4U7lLm1 for <keyassure@core3.amsl.com>; Wed, 3 Nov 2010 10:47:44 -0700 (PDT)
Received: from hoffman.proper.com (Hoffman.Proper.COM [207.182.41.81]) by core3.amsl.com (Postfix) with ESMTP id E4B8428C105 for <keyassure@ietf.org>; Wed, 3 Nov 2010 10:47:43 -0700 (PDT)
Received: from [10.20.30.150] (75-101-30-90.dsl.dynamic.sonic.net [75.101.30.90]) (authenticated bits=0) by hoffman.proper.com (8.14.4/8.14.3) with ESMTP id oA3Hli24059027 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 3 Nov 2010 10:47:46 -0700 (MST) (envelope-from paul.hoffman@vpnc.org)
Mime-Version: 1.0
Message-Id: <p06240814c8f75014369f@[10.20.30.150]>
In-Reply-To: <alpine.LSU.2.00.1011031723410.8553@hermes-2.csi.cam.ac.uk>
References: <286A23F7-0E2F-4F5E-906C-315DD9B325DA@princeton.edu> <p0624084ec8ef630fbae1@10.20.30.151> <4CC9E7AB.1030501@cs.tcd.ie> <p0624086dc8ef9feba340@10.20.30.151> <B6CEBA10-0198-4AB3-B6D4-E7D835FD47F1@princeton.edu> <AANLkTin-CqduBX5ibUCb0+1Lr-GXJ-KGd8YxzjUTPEO7@mail.gmail.com> <CA58B286-8F9D-423D-B9BF-91347F6FD960@Princeton.EDU> <1288462840.1977.4.camel@mattlaptop2.local> <69345A7D-4834-40E4-99C2-EDF3FC2DDEB3@Princeton.EDU> <1288469609.1977.178.camel@mattlaptop2.local> <EAC89FC3-184C-449C-AE5B-E3950578ED30@Princeton.EDU> <1288477403.1977.319.camel@mattlaptop2.local> <m3wroz6x81.fsf@jhcloos.com> <B255379A-6B1A-4E0B-AC66-EAD8F4B62040@kumari.net> <alpine.LSU.2.00.1011031546490.18926@hermes-2.csi.cam.ac.uk> <p0624080bc8f73e470aa3@[10.20.30.150]> <alpine.LSU.2.00.1011031647271.8553@hermes-2.csi.cam.ac.uk> <p06240810c8f747e44b70@[10.20.30.150]> <alpine.LSU.2.00.1011031723410.8553@hermes-2.csi.cam.ac.uk>
Date: Wed, 03 Nov 2010 10:47:43 -0700
To: Tony Finch <dot@dotat.at>
From: Paul Hoffman <paul.hoffman@vpnc.org>
Content-Type: text/plain; charset="us-ascii"
Cc: keyassure@ietf.org
Subject: Re: [keyassure] PKIX/KIDNS validation results and draft-hoffman-keys-linkage-from-dns
X-BeenThere: keyassure@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Key Assurance With DNSSEC <keyassure.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/keyassure>, <mailto:keyassure-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/keyassure>
List-Post: <mailto:keyassure@ietf.org>
List-Help: <mailto:keyassure-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/keyassure>, <mailto:keyassure-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Nov 2010 17:47:45 -0000

At 5:28 PM +0000 11/3/10, Tony Finch wrote:
>On Wed, 3 Nov 2010, Paul Hoffman wrote:
>>
>> It is still far from clear how KIDNS will deal with SRV, so it is
>> premature to say that subdomains will be a problem. If KIDNS records are
>> retrieved for the name gotten from (not given to) the SRV request, there
>> is no issue, is there?
>
>Not from the RRset size point of view, but doing that is bad for
>performance.

Can you be specific here? I'm not at all saying you are wrong; I might have dropped something in the redirection. My thought (possibly incorrect) is that one would only do a KIDNS lookup after they had gotten to the terminal end of an SRV chain.

--Paul Hoffman, Director
--VPN Consortium