IETF Logo Mail Archive

Re: [kitten] Diffie-Hellman modulus sizing in Kerberos PKINIT

Benjamin Kaduk <kaduk@mit.edu> Fri, 30 July 2021 16:50 UTC

Return-Path: <kaduk@mit.edu>
X-Original-To: kitten@ietfa.amsl.com
Delivered-To: kitten@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 93EEB3A316A; Fri, 30 Jul 2021 09:50:05 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.498
X-Spam-Level:
X-Spam-Status: No, score=-1.498 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, KHOP_HELO_FCRDNS=0.399, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=no 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 UmSW1gczP_Tk; Fri, 30 Jul 2021 09:50:01 -0700 (PDT)
Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AB8453A3153; Fri, 30 Jul 2021 09:49:43 -0700 (PDT)
Received: from kduck.mit.edu ([24.16.140.251]) (authenticated bits=56) (User authenticated as kaduk@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 16UGnZRK027588 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 30 Jul 2021 12:49:41 -0400
Date: Fri, 30 Jul 2021 09:49:35 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Robbie Harwood <rharwood@redhat.com>
Cc: curdle@ietf.org, kitten@ietf.org
Message-ID: <20210730164935.GY3932@kduck.mit.edu>
References: <jlgeebfzxe5.fsf@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <jlgeebfzxe5.fsf@redhat.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/kitten/NMjNE9WppV-T6X8AVIW-kQdRGGM>
Subject: Re: [kitten] Diffie-Hellman modulus sizing in Kerberos PKINIT
X-BeenThere: kitten@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Common Authentication Technologies - Next Generation <kitten.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/kitten>, <mailto:kitten-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/kitten/>
List-Post: <mailto:kitten@ietf.org>
List-Help: <mailto:kitten-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/kitten>, <mailto:kitten-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 30 Jul 2021 16:50:14 -0000

Thanks, Robbie!

MUST 4k and MAY 2k is not what my first instinct would have been, but on
further reflection it seems defensible as forward-looking guidance.

-Ben

On Fri, Jul 30, 2021 at 10:31:14AM -0400, Robbie Harwood wrote:
> Hi curdle + kitten,
> 
> I've put together a short document to update the minimum DH modulus size
> used in Kerberos Public Key Initial Authentication (RFC 4556), similar
> to what RFC 8270 did for SSH.
> 
> It can be found at:
> https://datatracker.ietf.org/doc/draft-harwood-krb-pkinit-dh-upsize/
> 
> Be well,
> --Robbie



> _______________________________________________
> Kitten mailing list
> Kitten@ietf.org
> https://www.ietf.org/mailman/listinfo/kitten

v2.8.7 | Report a Bug | By Email