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Re: [MLS] Stupidest possible message protection

Richard Barnes <rlb@ipv.sx> Mon, 03 December 2018 21:38 UTC

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From: Richard Barnes <rlb@ipv.sx>
Date: Mon, 03 Dec 2018 16:38:44 -0500
Message-ID: <CAL02cgSRorPdgr2HdEHUFH5vsRoKqJPtirO=9h8cdiAX6X+haA@mail.gmail.com>
To: Raphael Robert <raphael=40wire.com@dmarc.ietf.org>
Cc: mls@ietf.org
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Subject: Re: [MLS] Stupidest possible message protection
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Do you also mean that all the clients in a group decide independently?
(Even with a single vendor, you could have version migrations). Or does the
group need to agree?

On Mon, Dec 3, 2018, 16:37 Raphael Robert <raphael=40wire.com@dmarc.ietf.org
wrote:

>
>
> On 3 Dec 2018, at 22:27, Katriel Cohn-Gordon <me@katriel.co.uk> wrote:
>
> I think "clients choose" != "users choose" --- rather, whoever builds this
> into their application makes the choice for their users in the client code.
>
>
> That’s what I meant. It will be up to the application vendor to decide on
> the UX.
>
>
>
> On Mon, 3 Dec 2018, at 9:10 PM, Russ Housley wrote:
>
>
>
> On Dec 3, 2018, at 10:46 AM, Raphael Robert <
> raphael=40wire.com@dmarc.ietf.org> wrote:
>
> I agree with Richard that letting clients choose is a good idea. I think
> that for the sake of simplicity clients should choose whether to encrypt HS
> messages or not right at group creation
>
>
> It is not clear to me how a user would make that choice.  They do not
> really have much visibility into the consequences of the choice.  So, it
> would be good for this group to make to choice or provide a concise
> description of those consequences in language a user might find helpful.
>
> Russ
>
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