[MLS] Virtual Interim minutes
Nick Sullivan <nick@cloudflare.com> Wed, 29 January 2020 21:39 UTC
Return-Path: <nick@cloudflare.com>
X-Original-To: mls@ietfa.amsl.com
Delivered-To: mls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1])
by ietfa.amsl.com (Postfix) with ESMTP id 2EA9612004E
for <mls@ietfa.amsl.com>; Wed, 29 Jan 2020 13:39:34 -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,
DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1,
DKIM_VALID_AU=-0.1, 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 (1024-bit key)
header.d=cloudflare.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 xko_dVqtAPED for <mls@ietfa.amsl.com>;
Wed, 29 Jan 2020 13:39:31 -0800 (PST)
Received: from mail-vs1-xe2d.google.com (mail-vs1-xe2d.google.com
[IPv6:2607:f8b0:4864:20::e2d])
(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 C3A5D120045
for <mls@ietf.org>; Wed, 29 Jan 2020 13:39:30 -0800 (PST)
Received: by mail-vs1-xe2d.google.com with SMTP id n27so821389vsa.0
for <mls@ietf.org>; Wed, 29 Jan 2020 13:39:30 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=cloudflare.com; s=google;
h=mime-version:from:date:message-id:subject:to;
bh=X4LC42jE6h1Blf38WhwfPkrNywJLRygzhuE/NTic+qI=;
b=dVRzN00oQ2B/q2UCHELlmG2Li5YajmV32oHzbS+sdV8ExyEohKsnR6oZPlnJkaSUSB
RBjT6fKi3uEuFImgUgy4ctlTpxLejuaX5KONaf24UGGwdNKb1NPc5u88PM2aSdcUU15X
6eHdYHJx2WAxsYEXflvIML4tzddpLc9qxQqPI=
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20161025;
h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
bh=X4LC42jE6h1Blf38WhwfPkrNywJLRygzhuE/NTic+qI=;
b=J2USVHskoHngRHFw6Q3NKVLlqWRcKwMAcY09klYg5j/LKjN5+digwm3SrWtGCjfp7t
oRQUqkucu+Uek36/umxWePIJ6YmywiBIrmRcmAx1mpBpWXm0VXt44a9MmG5fMVUDHULN
8IFFe1tgdx5rtaOClxqPWc0M8uM2rNgkEDMba/TlMioV2GrYZIKAhtixgsF7r96hqFUc
sh6CG8TMbvAKT8tjA/+vJmvsiMVdek7HX8O0vg82++2ASQAp2PKqxkQd2mtqxMkTJM1q
Ki2NawR5gx3/d4f6r+701Zl8MZILJTUGyEXTw2oSH8r66gKLrFn2Yul8cSdiFTHVnNc4
IEXA==
X-Gm-Message-State: APjAAAVdp7wdMt+FHoSjrxjwZ2/jyFwkdJsLHLpQPKVcq/xncDi1WQsO
2ikfpdMTfTL9mPYz+ngpf6J2DgJtYbZp/apvqgdLrLepjatn5g==
X-Google-Smtp-Source: APXvYqwJjAxJTObZNCa2QW1cghEViYTNatZK8HB9rGfQGGtMIC0cb885HOPNQr3rhuG/vpCjipoAYQN/ZLO3jZHCU/I=
X-Received: by 2002:a05:6102:30a7:: with SMTP id
y7mr1090498vsd.212.1580333968645;
Wed, 29 Jan 2020 13:39:28 -0800 (PST)
MIME-Version: 1.0
From: Nick Sullivan <nick@cloudflare.com>
Date: Wed, 29 Jan 2020 13:38:34 -0800
Message-ID: <CAFDDyk9rNuXD5=XEhCiw3Jiz1CrUTjM5oaH6cqt3LszGF+7Qgg@mail.gmail.com>
To: Messaging Layer Security WG <mls@ietf.org>
Content-Type: multipart/alternative; boundary="000000000000d411a6059d4e2c58"
Archived-At: <https://mailarchive.ietf.org/arch/msg/mls/ZZAz6tXj-jQ8nccf7SyIwSnhivQ>
Subject: [MLS] Virtual Interim minutes
X-BeenThere: mls@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Messaging Layer Security <mls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mls>,
<mailto:mls-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/mls/>
List-Post: <mailto:mls@ietf.org>
List-Help: <mailto:mls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mls>,
<mailto:mls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 29 Jan 2020 21:39:34 -0000
MLSWG, Draft minutes from the productive first virtual interim posted below. If you find an issue, submit a PR to Github: https://github.com/mlswg/wg-materials/blob/master/virtual-interim-recurring/01-29-2020.md Nick & Sean >>> Attendees: Joel Alwen, Richard Barnes, Raphael Robert, Britta Hale, Brendan McMillion, Nick Sullivan #247 - Welcome confirmation and key derivation * Fixes bugs RLB found in the last draft while implementing * OK to merge after rebase / conflict resolution #246 - Bugfixes in ClientInitKey, Commit, and Welcome * Derives the Welcome encryption key instead of generating fresh * ... under the general theory about not requiring freshness when not necessary * OK to merge after rebase / conflict resolution #283 - Use the same ratchet for Handshake and Application keys * There's no point to FS for Proposals because clients have to cache the plaintext anyway * Given that, the "flat derivation" approach should be fine * We should have separate keys per sender to it easier to avoid nonce collisions * RLB and RR to decide whether we should derive nonces on a hash ratchet or just use a counter #287 - Switch to signing strategy using one signature per leaf. * There was agreement among those on the call to proceed with this strategy (tree-hash-covers-parent-hash) * ... given the deniability concerns and unclear benefit of the alternative (parent-hash-covers-tree-hash) * If further considerations come to light from analysis, we can revisit later
- [MLS] Virtual Interim minutes Nick Sullivan
- Re: [MLS] Virtual Interim minutes Richard Barnes
- Re: [MLS] Virtual Interim minutes Benjamin Beurdouche
- Re: [MLS] Virtual Interim minutes Richard Barnes
- Re: [MLS] Virtual Interim minutes Sean Turner
- Re: [MLS] Virtual Interim minutes Sean Turner
- Re: [MLS] Virtual Interim minutes Sean Turner