Re: [tsvwg] [saag] Comments on draft-ietf-tsvwg-transport-encrypt-08.txt

Stephen Farrell <stephen.farrell@cs.tcd.ie> Wed, 06 November 2019 16:23 UTC

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To: Peter Gutmann <pgut001@cs.auckland.ac.nz>, David Schinazi <dschinazi.ietf@gmail.com>, Joe Touch <touch@strayalpha.com>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Wed, 6 Nov 2019 16:23:17 +0000
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Subject: Re: [tsvwg] [saag] Comments on draft-ietf-tsvwg-transport-encrypt-08.txt
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Hiya,

On 06/11/2019 10:11, Peter Gutmann wrote:
> 
> It's a well-written discussion of issues that need to be taken into account
> when considering header encryption.

FWIW, I don't agree that this is (yet) sufficiently well
written. I generally agree with Martin T's criticism of
the way things are described.

In addition, the document is missing any real description
of the harmful ways in which cleartext headers are being
(ab)used today. I believe I raised this point on draft-05,
and the authors' response was that it'd be too hard to
include that. (IIRC for sorta understandable reasons that
I mostly forget;-)

From my POV, that means that the text (not the authors,
the text) is biased against encrypting headers as it has
to end up having loads of text about why encrypting is
perceived as bad by some and almost no text on why not
encrypting is perceived as bad by some.

I do think the text is fixable, but suspect getting that
done will require a lot of work, given the precedent of
RFC8404. I'm unconvinced that is the best way for those
who choose to be involved to spend their IETF cycles.

Cheers,
S.

PS: I did skim the version before last, but haven't read
the latest. I do plan to do so sometime, so I might have
other comments too later on.