Re: [Ace] [core] Proposed charter for ACE (EAP over CoAP?)

Michael Richardson <mcr+ietf@sandelman.ca> Wed, 09 December 2020 18:55 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Dan Garcia <dan.garcia@um.es>, EMU WG <emu@ietf.org>, "core\@ietf.org WG \(core\@ietf.org\)" <core@ietf.org>, "ace\@ietf.org" <ace@ietf.org>
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Date: Wed, 09 Dec 2020 13:55:44 -0500
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Subject: Re: [Ace] [core] Proposed charter for ACE (EAP over CoAP?)
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Dan Garcia <dan.garcia@um.es> wrote:
    > EAP can be used in the context of IoT for authentication.

But, to what end?

1) If it is onboarding a new device, then there is no connectivity until after authentication.
   so you can't use CoAP, you have to use 802.1x, or some equivalent, or
   create a system such as draft-ietf-6tisch-minimal-security.
   Which does use CoAP and OSCORE already.

2) If it for application authentication, then you need to use EAP to setup
   MSK for later use by a context.
   We do this in IKEv2, (D)TLS already.

So the only left would be OSCORE, yet you write "could", as if it was an afterthought.

Tell me what is your application?  What will be impossible if we don't do
this work?

--
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide