IETF Logo Mail Archive

Re: [TLS] Confirming Consensus on removing RSA key Transport from TLS 1.3

Johannes Merkle <johannes.merkle@secunet.com> Thu, 27 March 2014 13:12 UTC

Return-Path: <Johannes.Merkle@secunet.com>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 65F081A06A8 for <tls@ietfa.amsl.com>; Thu, 27 Mar 2014 06:12:32 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.61
X-Spam-Level:
X-Spam-Status: No, score=-2.61 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01] autolearn=ham
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 ReLLwxQTOORp for <tls@ietfa.amsl.com>; Thu, 27 Mar 2014 06:12:30 -0700 (PDT)
Received: from a.mx.secunet.com (a.mx.secunet.com [195.81.216.161]) by ietfa.amsl.com (Postfix) with ESMTP id 1BAF11A02A9 for <tls@ietf.org>; Thu, 27 Mar 2014 06:12:30 -0700 (PDT)
Received: from localhost (alg1 [127.0.0.1]) by a.mx.secunet.com (Postfix) with ESMTP id 674061A00B5; Thu, 27 Mar 2014 14:12:27 +0100 (CET)
X-Virus-Scanned: by secunet
Received: from a.mx.secunet.com ([127.0.0.1]) by localhost (a.mx.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id RDjxcnpLSKIf; Thu, 27 Mar 2014 14:12:25 +0100 (CET)
Received: from mail-gw-int (unknown [10.53.40.207]) by a.mx.secunet.com (Postfix) with ESMTP id 0DD591A00B3; Thu, 27 Mar 2014 14:12:18 +0100 (CET)
Received: from [10.53.40.204] (port=41970 helo=mail-essen-01.secunet.de) by mail-gw-int with esmtp (Exim 4.80 #2 (Debian)) id 1WT9yy-0002S1-7y; Thu, 27 Mar 2014 14:04:32 +0100
Received: from [10.208.1.57] (10.208.1.57) by mail-essen-01.secunet.de (10.53.40.204) with Microsoft SMTP Server (TLS) id 14.3.174.1; Thu, 27 Mar 2014 14:12:17 +0100
Message-ID: <533423B0.3030106@secunet.com>
Date: Thu, 27 Mar 2014 14:12:16 +0100
From: Johannes Merkle <johannes.merkle@secunet.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.4.0
MIME-Version: 1.0
To: Alyssa Rowan <akr@akr.io>, tls@ietf.org
References: <AD51D38F-2CFE-4277-854D-C0E56292A336@cisco.com> <20140326211219.27D281AC7D@ld9781.wdf.sap.corp> <20140327095527.5335c7fa@hboeck.de> <20140327115551.GA24503@randombit.net> <6f43d6c5-b70f-4a80-98e6-f653011317c7@email.android.com>
In-Reply-To: <6f43d6c5-b70f-4a80-98e6-f653011317c7@email.android.com>
X-Enigmail-Version: 1.6
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Originating-IP: [10.208.1.57]
Archived-At: http://mailarchive.ietf.org/arch/msg/tls/Y9FIDgziFloQWTRVo9k7nTQBz4M
Subject: Re: [TLS] Confirming Consensus on removing RSA key Transport from TLS 1.3
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.15
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, 27 Mar 2014 13:12:32 -0000

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Alyssa Rowan schrieb am 27.03.2014 13:27:

> Suggestion: remove static RSA *and* traditional DHE and mandate ECDHE for key exchange in TLS 1.3. I propose, 
> curve25519 as mandatory-to-implement and secp256r1 as recommended-to-implement [? Also mandatory, maybe?], both in 
> constant time, which is comparatively easy, especially for 25519.

It is not wise to base the security of a protocol on a single computational problem and fixed key length.

- -- 
Johannes
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.20 (MingW32)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iEYEAREIAAYFAlM0I7AACgkQj8m9YkYyZmWTOACgxN3z0lnDf4vl6qaJOQHA/D4O
q8EAnRhC2Dd2lgB5oAjXWNDeOZl8c5G0
=0+gV
-----END PGP SIGNATURE-----

v2.23.0 | Report a Bug | By Email