[openpgp] Re: WG: BSI view on KEM combiners

Daniel Huigens <d.huigens@protonmail.com> Thu, 29 August 2024 10:06 UTC

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Date: Thu, 29 Aug 2024 10:06:00 +0000
To: "Ehlen, Stephan" <stephan.ehlen=40bsi.bund.de@dmarc.ietf.org>
From: Daniel Huigens <d.huigens@protonmail.com>
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Subject: [openpgp] Re: WG: BSI view on KEM combiners
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Hi Stephan,

On Thursday, August 29th, 2024 at 09:17, Ehlen, Stephan wrote:
> Dear Daniel,
> 
> sorry for the slow response. Before responding to newer e-mails regarding the draft
> that includes brainpool and NIST curves, I should finally answer your question here:

No worries, and thanks for the response.

> Given our current recommendations, the BSI would most likely not accept
> a composite of ML-KEM-1024 + X448 for use in products used to process confidential information.

That's a bit surprising to me, but alright.

As Britta said in the parallel thread, perhaps this should be brought up
& discussed in the CFRG, as this presumably has implications for all
working groups planning to adopt PQC, not just OpenPGP.

Best,
Daniel