Re: [MLS] Fwd: I-D Action: draft-omara-mls-federation-00.txt

Hi Ted,

Actually the intent was to support both scenarios and what is needed from
MLS to support them, which I think will be the same for both cases
(ignoring how different server entities communicate as mentioned in the
draft).

 I agree the text needs more clarification, will work on that!

Emad

On Wed, Mar 13, 2019 at 12:09 PM Ted Hardie <ted.ietf@gmail.com> wrote:

> Howdy,
>
> I found one of the use cases a bit confusing.  The text says:
>
>
> 3.2.  Different client applications
>
>    Different client applications operated by the same server can use MLS
>    to exchange E2EE handshake and application messages.  For example
>    different browsers can implement the MLS protocol, and web developers
>    write web applications that use the MLS implementation in the browser
>    to encrypt and decrypt the messages.  This will require a new
>    standard Web API to allow the client applications to set the address
>    of the delivery service in the browser.  A more concrete example is
>    using MLS in the browser to exchange SRTP keys for multi-party
>    conference call.
>
> It wasn't clear to me whether the intent was to cover single entities
> who have multiple client applications (e.g. a phone and browser sharing
> state on an exchange for a single user) or to cover the case where
> different client applications wanted to exchange messages for different
> users (the multi-party conference call among users on phones and
> different browsers).    Given the overall topic, I assume that the first
> of these is covered here and that the second is more basic to MLS, but
> it might be useful to revise the text here to clarify.
>
> regards,
>
> Ted Hardie
>
>
>
> On Wed, Mar 13, 2019 at 11:56 AM Sean Turner <sean@sn3rd.com> wrote:
>
>> At the interim in January, the WG discussed the possibility of adopting
>> work to address federations.  Part of that process is to consider and
>> individual draft first and then do a WG call for adoption.  Emad promised
>> to get a draft in before the deadline and he and Raphael met the deadline.
>> They did their bit so now it is time for the WG to discuss the draft.  We
>> have tentatively allocated some time on the agenda for this draft on the
>> assumption that it will generate some discussion based on the amount of
>> interest at the interim.
>>
>> Note that this “federation” we are talking about here is only about
>> federating some/all of the key establishment, authentication, and
>> confidentiality services because this would be in scope of the WG.
>>
>> spt
>>
>> Begin forwarded message:
>>
>> *From: *internet-drafts@ietf.org
>> *Subject: **I-D Action: draft-omara-mls-federation-00.txt*
>> *Date: *March 11, 2019 at 11:51:14 EDT
>> *To: *<i-d-announce@ietf.org>
>> *Reply-To: *internet-drafts@ietf.org
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>>
>>
>>        Title           : The Messaging Layer Security (MLS) Federation
>>        Authors         : Emad Omara
>>                          Raphael Robert
>> Filename        : draft-omara-mls-federation-00.txt
>> Pages           : 8
>> Date            : 2019-03-11
>>
>> Abstract:
>>   This document describes how the Messaging Layer Security (MLS) can be
>>   used in a federated environment where different MLS implementations
>>   can interoperate by defining the message format for user key
>>   retrieval.  The document also describes some use cases where
>>   federation could be useful.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-omara-mls-federation/
>>
>> There are also htmlized versions available at:
>> https://tools.ietf.org/html/draft-omara-mls-federation-00
>> https://datatracker.ietf.org/doc/html/draft-omara-mls-federation-00
>>
>>
>> Please note that it may take a couple of minutes from the time of
>> submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
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>>
>>
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