IETF Logo Mail Archive

Re: [TLS] draft-sheffer-tls-bcp: DH recommendations

Peter Gutmann <pgut001@cs.auckland.ac.nz> Thu, 19 September 2013 08:50 UTC

Return-Path: <pgut001@cs.auckland.ac.nz>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 228FF21F853A for <tls@ietfa.amsl.com>; Thu, 19 Sep 2013 01:50:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.599
X-Spam-Level:
X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[AWL=0.000, BAYES_00=-2.599]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lxZiNoPtYDzD for <tls@ietfa.amsl.com>; Thu, 19 Sep 2013 01:50:19 -0700 (PDT)
Received: from mx2.auckland.ac.nz (mx2.auckland.ac.nz [130.216.125.245]) by ietfa.amsl.com (Postfix) with ESMTP id 8FF5121F943C for <tls@ietf.org>; Thu, 19 Sep 2013 01:50:16 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=auckland.ac.nz; i=@auckland.ac.nz; q=dns/txt; s=uoa; t=1379580618; x=1411116618; h=from:to:subject:date:message-id: content-transfer-encoding:mime-version; bh=FaTJHN6tOIpXbJfIc+1aZr+34l5S46tT5hdtbScyc8A=; b=qE708JqqPd3M57pCqkjHN+Gj/LrwsH6Jgnq3+5L4TCW7HiF6ItUc7GYD 4R4ZYQ6+PXaSo+UmeK4yIM6PVt57dxzHMie9HbkjZ6mV2jZT7NlgoAGmf X8Hzl8bl5VfYKTOyTWrWwd3Pc7RNzUfGhSq84DLnFafG/6P2xi/xERPRN k=;
X-IronPort-AV: E=Sophos;i="4.90,936,1371038400"; d="scan'208";a="213030565"
X-Ironport-HAT: MAIL-SERVERS - $RELAYED
X-Ironport-Source: 130.216.4.171 - Outgoing - Outgoing
Received: from uxchange10-fe4.uoa.auckland.ac.nz ([130.216.4.171]) by mx2-int.auckland.ac.nz with ESMTP/TLS/AES128-SHA; 19 Sep 2013 20:50:06 +1200
Received: from UXCN10-6.UoA.auckland.ac.nz ([169.254.10.158]) by uxchange10-fe4.UoA.auckland.ac.nz ([130.216.4.171]) with mapi id 14.02.0318.004; Thu, 19 Sep 2013 20:50:05 +1200
From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] draft-sheffer-tls-bcp: DH recommendations
Thread-Index: Ac61FTyMzOCwOl5kS0aueBIeUMTlKw==
Date: Thu, 19 Sep 2013 08:50:05 +0000
Message-ID: <9A043F3CF02CD34C8E74AC1594475C7355674007@uxcn10-6.UoA.auckland.ac.nz>
Accept-Language: en-NZ, en-GB, en-US
Content-Language: en-NZ
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [130.216.158.4]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Subject: Re: [TLS] draft-sheffer-tls-bcp: DH recommendations
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/tls>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 19 Sep 2013 08:50:25 -0000

Yaron Sheffer <yaronf.ietf@gmail.com> writes:

>There are multiple issues with MODP DH in TLS (performance is just one of
>them). So I'd like to recommend EC DHE instead - which makes this discussion
>moot.

There are even more issues with ECC, namely their brittleness, paranoia
(whether justified or not) about NSA meddling, and patent issues.  DH is
simple in comparison.

Peter.

v2.27.8 | Report a Bug | By Email | System Status