IETF Logo Mail Archive

Re: [DNSOP] [Ext] Re: Resolver behaviour with multiple trust anchors

Edward Lewis <edward.lewis@icann.org> Wed, 01 November 2017 11:12 UTC

Return-Path: <edward.lewis@icann.org>
X-Original-To: dnsop@ietfa.amsl.com
Delivered-To: dnsop@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9292D13F5FB for <dnsop@ietfa.amsl.com>; Wed, 1 Nov 2017 04:12:00 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.2
X-Spam-Level:
X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] 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 b31dVtTzFNKj for <dnsop@ietfa.amsl.com>; Wed, 1 Nov 2017 04:11:59 -0700 (PDT)
Received: from out.west.pexch112.icann.org (pfe112-ca-2.pexch112.icann.org [64.78.40.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6AEE9139B9F for <dnsop@ietf.org>; Wed, 1 Nov 2017 04:11:59 -0700 (PDT)
Received: from PMBX112-W1-CA-1.pexch112.icann.org (64.78.40.21) by PMBX112-W1-CA-2.pexch112.icann.org (64.78.40.23) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Wed, 1 Nov 2017 04:11:57 -0700
Received: from PMBX112-W1-CA-1.pexch112.icann.org ([64.78.40.21]) by PMBX112-W1-CA-1.PEXCH112.ICANN.ORG ([64.78.40.21]) with mapi id 15.00.1178.000; Wed, 1 Nov 2017 04:11:57 -0700
From: Edward Lewis <edward.lewis@icann.org>
To: Mark Andrews <marka@isc.org>, Moritz Muller <moritz.muller@sidn.nl>
CC: "dnsop@ietf.org" <dnsop@ietf.org>
Thread-Topic: [Ext] Re: [DNSOP] Resolver behaviour with multiple trust anchors
Thread-Index: AQHTUiwiqVxvIHBV0Uun1GqDhxVA26L+sniqgAEi/QA=
Date: Wed, 01 Nov 2017 11:11:57 +0000
Message-ID: <49FB4D49-C7C7-44E3-B1A6-BA97A9535D83@icann.org>
References: <121CDBC2-D68C-48EE-A56E-46C61FC21538@sidn.nl> <20171101005014.0A2E38DCF888@rock.dv.isc.org>
In-Reply-To: <20171101005014.0A2E38DCF888@rock.dv.isc.org>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/f.27.0.171010
x-ms-exchange-messagesentrepresentingtype: 1
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [192.0.47.234]
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha1"; boundary="B_3592365116_1740693679"
MIME-Version: 1.0
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/GLmBFJNG24TvzoaYQxihlvrGaAE>
Subject: Re: [DNSOP] [Ext] Re: Resolver behaviour with multiple trust anchors
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: IETF DNSOP WG mailing list <dnsop.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnsop>, <mailto:dnsop-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dnsop/>
List-Post: <mailto:dnsop@ietf.org>
List-Help: <mailto:dnsop-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnsop>, <mailto:dnsop-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 01 Nov 2017 11:12:00 -0000

On 10/31/17, 20:50, "DNSOP on behalf of Mark Andrews" <dnsop-bounces@ietf.org on behalf of marka@isc.org> wrote:
   
>Secondly doing deepest match on trust anchors is the only secure way to prevent a parent overriding the child zone's security policy.

By this, do you mean choice of cryptographic algorithm and/or length?  To achieve "independence" in this way, the child can simply refuse to have a DS record at the parent and then lean on managing trust anchors at all relying resolvers.

v2.23.0 | Report a Bug | By Email