IETF Logo Mail Archive

Re: [TLS] Fresh results

Dave Garrett <davemgarrett@gmail.com> Thu, 03 December 2015 22:31 UTC

Return-Path: <davemgarrett@gmail.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 A18891ACF54 for <tls@ietfa.amsl.com>; Thu, 3 Dec 2015 14:31:15 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] 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 tLJaT0Ch493U for <tls@ietfa.amsl.com>; Thu, 3 Dec 2015 14:31:14 -0800 (PST)
Received: from mail-qg0-x231.google.com (mail-qg0-x231.google.com [IPv6:2607:f8b0:400d:c04::231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8A5421ACF57 for <tls@ietf.org>; Thu, 3 Dec 2015 14:31:11 -0800 (PST)
Received: by qgeb1 with SMTP id b1so74449905qge.1 for <tls@ietf.org>; Thu, 03 Dec 2015 14:31:10 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-type:content-transfer-encoding:message-id; bh=ntYcZmuYLJ9gNKc4uZj6ffJBFgyCjTaRgSfTZTf2i3M=; b=hZjYomfE1Xar0hsoKxpSSGd59gXaUw328FmmGcOsWlM5GhQabacRabZMjQs5JOlrXt QbiR+XLuDxo2EOTD8cOswYLWuU9rVOa43M5X240R3BPJjTSEfWMQtoziy67Tann6P9oa T+y7LO2vSon3FCoaz1QV6Gq/8YueLKobt2Py0GQbHyseJiY3cRnYodd6YeBBBBkyYuLb bPYKp74xNWuzvlMghApOTJJUwB6pSNdt7z3Aa3I+xiFlbJIJ07r7SGLoLTBH+UVBRrdQ CWwasfUkqca+zOpLNHmKzXPCcO5Ep85XG4YYyIY3s7Ed3FCgzlxYsH87+iS3QMrL6zXC wh+A==
X-Received: by 10.140.96.76 with SMTP id j70mr14177327qge.100.1449181870842; Thu, 03 Dec 2015 14:31:10 -0800 (PST)
Received: from dave-laptop.localnet (pool-72-94-152-197.phlapa.fios.verizon.net. [72.94.152.197]) by smtp.gmail.com with ESMTPSA id p19sm4217132qgp.9.2015.12.03.14.31.09 (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 03 Dec 2015 14:31:10 -0800 (PST)
From: Dave Garrett <davemgarrett@gmail.com>
To: tls@ietf.org
Date: Thu, 03 Dec 2015 17:31:07 -0500
User-Agent: KMail/1.13.5 (Linux/2.6.32-74-generic-pae; KDE/4.4.5; i686; ; )
References: <CACsn0cm41VD40tiwR-sO9piPu01rRkoWKPwHWCKcr5Z9id8kDg@mail.gmail.com> <CANOyrg9AwQHfjZssf0c_=hfHvwLAuq2kFZwkOM7d8tHoHjaQ1A@mail.gmail.com> <24527269-956F-4DFD-8801-1A5331DF0C20@gmail.com>
In-Reply-To: <24527269-956F-4DFD-8801-1A5331DF0C20@gmail.com>
MIME-Version: 1.0
Content-Type: Text/Plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Message-Id: <201512031731.08321.davemgarrett@gmail.com>
Archived-At: <http://mailarchive.ietf.org/arch/msg/tls/_J6NSNFRUMvE5fpm2WWlnoMZ7bg>
Subject: Re: [TLS] Fresh results
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: <https://mailarchive.ietf.org/arch/browse/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, 03 Dec 2015 22:31:15 -0000

On Thursday, December 03, 2015 03:47:52 pm Yoav Nir wrote:
> Wouldn’t it be better to mandate that if your TLS implementation supports both TLS 1.2 and TLS 1.3 it should take actions necessary to mitigate the bleichenbacher attack?
> 
> In fact, if you don’t care much about very old browsers, isn’t it possible today to mandate that the TLS implementation not use RSA keying? That way the oracle is gone.
> 
> Seems better than requiring web server administrators to acquire two certificates.


A draft of the simple solution:
https://github.com/davegarrett/tls13-spec/commit/edeed6e90c177df6670935fceea69e14b3951e53


Dave

v2.14.0 | Report a Bug | By Email