Re: [MLS] Virtual Interim minutes

Sean Turner <sean@sn3rd.com> Wed, 19 February 2020 00:58 UTC

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From: Sean Turner <sean@sn3rd.com>
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Date: Tue, 18 Feb 2020 19:58:18 -0500
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Subject: Re: [MLS] Virtual Interim minutes
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I have upload the 1st 3 interim virtual meeting minutes to the IETF datatrack.

spt

> On Feb 12, 2020, at 20:59, Sean Turner <sean@sn3rd.com> wrote:
> 
> MLSWG,
> 
> Draft minutes* available for the 3rd virtual interim at the link below. As before, if you find an issue please submit a PR to Github:
> https://github.com/mlswg/wg-materials/blob/master/virtual-interim-recurring/02-12-2020.md
> 
> spt
> 
> * Thanks to rlb.
> 
>> On Feb 11, 2020, at 21:11, Sean Turner <sean@sn3rd.com> wrote:
>> 
>> MLSWG,
>> 
>> Revised minutes from the first virtual interim posted at the link 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
>> In one week, I will post the final minutes to the IETF site.
>> 
>> Draft minutes for the second virtual interim posted at the link below. If you find an issue, submit a PR to Github:
>> https://github.com/mlswg/wg-materials/blob/master/virtual-interim-recurring/02-05-2020.md
>> 
>> spt
>> 
>>> On Jan 29, 2020, at 16:38, Nick Sullivan <nick=40cloudflare.com@dmarc.ietf.org> wrote:
>>> 
>>> 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 mailing list
>>> MLS@ietf.org
>>> https://www.ietf.org/mailman/listinfo/mls
>> 
>