Re: [TLS] Requesting working group adoption of draft-stebila-tls-hybrid-design

Rob Sayre <sayrer@gmail.com> Thu, 13 February 2020 04:24 UTC

Return-Path: <sayrer@gmail.com>
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 8CE0412008C for <tls@ietfa.amsl.com>; Wed, 12 Feb 2020 20:24:22 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 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, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
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 PMJjBATsA2QD for <tls@ietfa.amsl.com>; Wed, 12 Feb 2020 20:24:19 -0800 (PST)
Received: from mail-io1-xd33.google.com (mail-io1-xd33.google.com [IPv6:2607:f8b0:4864:20::d33]) (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 7315812008A for <TLS@ietf.org>; Wed, 12 Feb 2020 20:24:19 -0800 (PST)
Received: by mail-io1-xd33.google.com with SMTP id z8so4981272ioh.0 for <TLS@ietf.org>; Wed, 12 Feb 2020 20:24:19 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=gOydzurpRzmyot1vkY692z2HabX0nM1Mudt3yeflcxM=; b=rk1Ku6exoWVBsKcEXGFgXEXziWvULyRrMuvOY7MFGC47EyY+rBDRtSPBZVQAuCjPI4 +Z3k72ANSZvZluxBfCJBZ5fQVUFnEm5O75duwtxJaCwJqsUbnMZbygsYl+qikEx4hD8f /7d3m7ae2AXuMeAW7WVX1XE+ThLT/So7hrVhEaLDMtgfA/r37EhR/Q/T1LLfJXL7Tm7G jyzYzPteggd6ocuPywYPXog/S3IKmgM4uFOeDKQp4Rq0ql8Gd3RNmWuu0410YPXCIhd1 PKI+Wm4jWE6T8nhhx7ux3WBZpslMfJOBF+uIkzHN+e6r214b7/Z2lXrB5noWdwn4M0Fs 5Nqw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=gOydzurpRzmyot1vkY692z2HabX0nM1Mudt3yeflcxM=; b=W6p3qj2kAb2Z2NogaTv1Ul1V6oK3d51zUg51zpRYmwmKVszHF+2lXx/PfM1kmdsZwB rit5WmEfL2S/jMFf1SdvLuI6PdphC77UPt7nFVuUebI4zBLVA1gi7OmfynR6J6qctlUS r1wjV5VbsobvU5GXLrZ8XeEwfR+wQ3pB39iXtP4Eoex5PPl8O9pdbISRxLAcCmVIgNt3 E9iHICFQstnY/Cb3eXgonyExdH2SeJb9/Ra2Cl7z7g4qm5V0Mh67/d1R4a05JfZnUOpB GARv1R6iMYOkZKomjqbwLlha1IB1EmAURlSoU2kINgtphsT02TeiROHAuhPhL/O1ZNNH dHcA==
X-Gm-Message-State: APjAAAWM0M68Gg54fTIoWQx3Mu2EF6jflniizJVNQnCLSruQUVPEpNXq sIX5/FY5W2QjlIgLgFmrYsqcUY4Pa4kLAi9PlBM=
X-Google-Smtp-Source: APXvYqwitDovxc9M04ONF6wamjMg3d4v3vhZZy+M52DIbKFLFdcXwmit7EObKjkcPr51d4W0G5BucmJeRaQK5+ZPiuk=
X-Received: by 2002:a05:6638:723:: with SMTP id j3mr22197281jad.131.1581567858312; Wed, 12 Feb 2020 20:24:18 -0800 (PST)
MIME-Version: 1.0
References: <CAFBh+SRAJAbviyrcQM2PjztumAH565i4-ui28OQ-pCJE9nePJg@mail.gmail.com>
In-Reply-To: <CAFBh+SRAJAbviyrcQM2PjztumAH565i4-ui28OQ-pCJE9nePJg@mail.gmail.com>
From: Rob Sayre <sayrer@gmail.com>
Date: Wed, 12 Feb 2020 20:24:03 -0800
Message-ID: <CAChr6SyMxDvN5fnCNMpd3vmufQQkNvdrJJwxzNU3TdnbuwZMJA@mail.gmail.com>
To: Douglas Stebila <douglas@stebila.ca>
Cc: "<tls@ietf.org>" <TLS@ietf.org>, Shay Gueron <shay.gueron@gmail.com>
Content-Type: multipart/alternative; boundary="000000000000620a17059e6d76f0"
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/LAqW87B_xlisx-Vlv4JkJ8xkAFc>
Subject: Re: [TLS] Requesting working group adoption of draft-stebila-tls-hybrid-design
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.29
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, 13 Feb 2020 04:24:23 -0000

On Wed, Feb 12, 2020 at 11:26 AM Douglas Stebila <douglas@stebila.ca> wrote:

> Dear TLS working group,
>
> We would like to request the working group adopt
> draft-stebila-tls-hybrid-design, "Hybrid key exchange in TLS 1.3", as
> a working group item.  We have updated the draft based on feedback
> we've received over the past few months, including from our
> presentations at IETF 104 and 105, and think the current version
> represents the view of the WG to date.
>
> https://datatracker.ietf.org/doc/draft-stebila-tls-hybrid-design/


Hi,

Thanks for submitting this draft.

Would it be ok to add a rationale to the "Goals" section around backward
compatibility? I'm not sure how the compatibility points will interact with
downgrade attacks.

thanks,
Rob