Re: [Cfrg] review of draft-irtf-cfrg-hpke-05

Stephen Farrell <stephen.farrell@cs.tcd.ie> Sat, 15 August 2020 14:23 UTC

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To: Christopher Wood <caw@heapingbits.net>, cfrg@irtf.org
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Sat, 15 Aug 2020 15:23:13 +0100
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Subject: Re: [Cfrg] review of draft-irtf-cfrg-hpke-05
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Hiya,

Just a bit more on one thing below...

On 15/08/2020 15:00, Christopher Wood wrote:
>> - Do we really need to s/HPKE-05/RFCXXXX/ later? Why not just
>> change to "HPKE-first-rfc" once the RG are done with the document?
>> (There can be delays @ IRSG and subsequently that I'd prefer not
>> have to affect interop.)
> 
> This was done to ensure each draft version (going forward) is
> incompatible. We probably should have done this from the start.

Sure, I get the "why" and am fine with that. The only
concern is that when the RG are finished and then hit
"publication requested" it might take a while for the
RFC number to be known (e.g. a few months). This draft,
plus the esni and svcb drafts are likely to form a small
cluster so that might well extend the delays some. If MLS
were added to that cluster that might add more too.

If OTOH, we ask the RFC editor to replace with a string
we already know then I think that should reduce the
need for breaking interop after the cluster-induced delay.
(It's true that for this to be useful, the same trick
might need to be more widely adopted, but starting with
hpke seems fine as others in the putative cluster would
depend on this and not the other way about.)

Cheers,
S.