Re: [Ace] draft-ietf-ace-mqtt-tls-profile connections

Cigdem Sengul <cigdem.sengul@gmail.com> Thu, 23 May 2019 08:33 UTC

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From: Cigdem Sengul <cigdem.sengul@gmail.com>
Date: Thu, 23 May 2019 09:33:44 +0100
Message-ID: <CAA7SwCPXDNnPxPXm8nk9CeonSYrXv0WPOo2LZWHZxKJeektbaQ@mail.gmail.com>
To: Ludwig Seitz <ludwig.seitz@ri.se>
Cc: ace@ietf.org
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Subject: Re: [Ace] draft-ietf-ace-mqtt-tls-profile connections
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Hello Ludwig,

This was MQTT-SN-over-DTLS was on our agenda when first we started out.
However, at that time there was not much take-up of MQTT-SN  in practice
(not sure that changed). If there is sufficient interest in the group,
would make sense to do that as well, and theoretically, it would be a more
natural fit to ACE.
Thanks,
--Cigdem

On Thu, May 23, 2019 at 7:29 AM Ludwig Seitz <ludwig.seitz@ri.se>; wrote:

> On 21/05/2019 22:35, Cigdem Sengul wrote:
> > Thank you for your comments.  I see that we tried to cover too many
> > options in the draft, and things got mixed up.I tried to clarify inline.
> >
> >     * So as a client I get a token from the AS.  For the first run,
> >     assume that
> >     it has a RPK in it.
> >     * I now connect to the server using TLS.
> >              Question #1 - Am I doing client authentication at this
> >     point in TLS?
> >     This is what is happening for all of the current profiles, but it is
> not
> >     clear that this is happening for this profile.  The answer appears
> to be
> >     both yes and no.
> >
> > The basic method we were thinking:
> >
> >
> >  1. We have not assumed client-side certificates for authenticating
> >     clients during TLS handshake. RS uses a server-side certificate.
>
>
>
> One quick question: If I understand it correctly there is a variant of
> MQTT using UDP (MQTT-SN). Since TLS and TCP are not exactly
> "constrained-friendly", would it make sense to look at that as well to
> define a "MQTT-SN-over-DTLS-based" profile?
>
> /Ludwig
>
>
> --
> Ludwig Seitz, PhD
> Security Lab, RISE
> Phone +46(0)70-349 92 51
>
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