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[CFRG] Re: [hpke] Re: [EXTERNAL] [lamps] Re: Re: Re: New labels in draft-irtf-cfrg-concrete-hybrid-kems-01

Filippo Valsorda <filippo@ml.filippo.io> Thu, 30 October 2025 11:58 UTC

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Date: Thu, 30 Oct 2025 12:58:34 +0100
From: Filippo Valsorda <filippo@ml.filippo.io>
To: Mike Ounsworth <ounsworth+ietf@gmail.com>, CFRG <cfrg@irtf.org>, hpke@ietf.org, LAMPS WG <spasm@ietf.org>
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Subject: [CFRG] Re: [hpke] Re: [EXTERNAL] [lamps] Re: Re: Re: New labels in draft-irtf-cfrg-concrete-hybrid-kems-01
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2025-10-30 12:28 GMT+01:00 Mike Ounsworth <ounsworth+ietf@gmail.com <mailto:ounsworth%2Bietf@gmail.com>>:
> Somehow, HPKE and LAMPS lists got dropped from the TO: field. So re-sending to the correct lists.

I replied to the CFRG-only version of this email. See https://mailarchive.ietf.org/arch/msg/cfrg/1FGYU2L4PMLUKRMN8xRo0q7oB2Q/.

> To this point by Rohan:
> """
> By the way the code point for HPKE is defined in draft-ietf-hpke-pq, not this draft, and (thankfully) it doesn't use the ascii art labels. It uses:
> MLKEM768-P256
> MLKEM768-P384
> MLKEM768-X25519
> """
> 
> And reply by Watson:
> "If every consuming spec redefines these what does it mean for libraries, API misuse security and ultimate the point of advancing this draft at all?"
> Yeah, I thought we had been given clear instructions from the community that they wanted the LAMPS thing and the HPKE thing to be the same thing (including labels) so that crypto libraries only had to implement this once. Whatever. I will align LAMPS to the CRFG draft. If the HPKE WG wants to do something different, that's not a thing I have any say on.

To avoid confusion: my understanding of the hpke-pq draft is that it defers completely to the CFRG drafts for the implementation. Those are HPKE KEM names, not on-the-wire labels, so there is no divergence.

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