Re: [secdir] review of draft-ietf-dnsext-dnssec-gost-05

Andrew Sullivan <ajs@shinkuro.com> Fri, 08 January 2010 18:22 UTC

Return-Path: <ajs@shinkuro.com>
X-Original-To: secdir@core3.amsl.com
Delivered-To: secdir@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 405523A689A for <secdir@core3.amsl.com>; Fri, 8 Jan 2010 10:22:27 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.157
X-Spam-Level:
X-Spam-Status: No, score=-3.157 tagged_above=-999 required=5 tests=[AWL=-0.558, BAYES_00=-2.599]
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 MizV31DozpL4 for <secdir@core3.amsl.com>; Fri, 8 Jan 2010 10:22:25 -0800 (PST)
Received: from mail.yitter.info (mail.yitter.info [208.86.224.201]) by core3.amsl.com (Postfix) with ESMTP id 6964E3A688D for <secdir@ietf.org>; Fri, 8 Jan 2010 10:22:25 -0800 (PST)
Received: from crankycanuck.ca (69-196-144-230.dsl.teksavvy.com [69.196.144.230]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.yitter.info (Postfix) with ESMTPSA id DD1542FE8CA1; Fri, 8 Jan 2010 18:22:20 +0000 (UTC)
Date: Fri, 08 Jan 2010 13:22:19 -0500
From: Andrew Sullivan <ajs@shinkuro.com>
To: Paul Hoffman <phoffman@imc.org>
Message-ID: <20100108182219.GN26259@shinkuro.com>
References: <p06240810c76be77be756@[128.89.89.161]> <20100107222809.GA25747@shinkuro.com> <p06240818c76c1a38cbf8@[128.89.89.161]> <20100108144431.GB26259@shinkuro.com> <p06240812c76d0821dd1b@[10.20.30.158]>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <p06240812c76d0821dd1b@[10.20.30.158]>
User-Agent: Mutt/1.5.18 (2008-05-17)
Cc: secdir@ietf.org, dol@cryptocom.ru, ogud@ogud.com, Ralph Droms <rdroms@cisco.com>
Subject: Re: [secdir] review of draft-ietf-dnsext-dnssec-gost-05
X-BeenThere: secdir@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Security Area Directorate <secdir.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/secdir>, <mailto:secdir-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/secdir>
List-Post: <mailto:secdir@ietf.org>
List-Help: <mailto:secdir-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/secdir>, <mailto:secdir-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 08 Jan 2010 18:22:27 -0000

On Fri, Jan 08, 2010 at 08:12:29AM -0800, Paul Hoffman wrote:

> It is for this reason that DNSSEC does not, for example, require
> that resolvers MUST be able to validate RSA signatures with 256-bit
> keys. However, by saying that resolvers MUST be able to validate
> anything other than the widely-agreed-to algorithms, you are opening
> up such an attack.

Now, this is an interesting point.  I think if one combines this
argument with Steve's point that a certain baseline of mandatory
algorithms should be required _only_ because you need some common set
for interoperability, one has a pretty good argument that most
algorithms should be MAYs and not stronger.

Thanks,

A

-- 
Andrew Sullivan
ajs@shinkuro.com
Shinkuro, Inc.