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[Teep] Transport Protocol

Dave Thaler <dthaler@microsoft.com> Thu, 02 November 2017 00:52 UTC

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From: Dave Thaler <dthaler@microsoft.com>
To: "teep@ietf.org" <teep@ietf.org>
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Date: Thu, 02 Nov 2017 00:52:27 +0000
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Subject: [Teep] Transport Protocol
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As promised when I posted my review, I am starting several email threads for discussions on specific technical topics.
This is one of them.


Section 1:
> This specification defines message payloads exchanged between devices

> and a TSM but does not mandate a specific transport.


Section 5:
> The communication method of OTrP Messages between a TSM and TEE in a
> device is left to TSM providers for maximal interoperability.

I disagree, the lack of any spec for a transport results in lack of maximal interoperability.
The TSM and the TEE may be from different vendors as the draft nicely explains earlier.
So bindings to one or more transport protocol (the thing that carries the JSON messages inside it) must be standardized.
Otherwise, in my view there's little value in standardizing the payload formats.

Such a transport protocol binding might be in the same spec or in a different spec, but either way
I think specifying at least one is mandatory.

Dave

From: Dave Thaler
Sent: Saturday, September 23, 2017 12:24 PM
To: 'teep@ietf.org' <teep@ietf.org>
Subject: Review of draft-pei-opentrustprotocol-04

I've finally made it through a detailed review of draft-pei-opentrustprotocol-04 and my marked up copy is at
https://www.microsoft.com/en-us/research/wp-content/uploads/2017/05/draft-pei-opentrustprotocol-04.pdf

I have lots of editorial fixes throughout, and a number of technical comments/questions/issues.

I'll start separate email threads for some of them over the next several days.

Dave

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