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[lamps] Re: WG Last Call for draft-ietf-lamps-kyber-certificates-07

Russ Housley <housley@vigilsec.com> Fri, 17 January 2025 21:06 UTC

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Subject: [lamps] Re: WG Last Call for draft-ietf-lamps-kyber-certificates-07
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In response to the WG Last Call, Dan Bernstein <djb@cr.yp.to <mailto:djb@cr.yp.to>> pointed out some potential IPR.

BCP 79 makes this important point:

   (b) The IETF, following normal processes, can decide to use
       technology for which IPR disclosures have been made if it decides
       that such a use is warranted.

The following information is provided so that people can make their own determination.


(1) NIST has signed patent licenses regarding patents US9094189 (Gaborit and Aguilar-Melchor) and US9246675 (Ding).  NIST has release all of the information about the licenses that it can:

https://csrc.nist.gov/csrc/media/Projects/post-quantum-cryptography/documents/selected-algos-2022/nist-pqc-license-summary-and-excerpts.pdf


(2) Dan also pointed to a message where KCL publicly claimed two additional patents:

https://groups.google.com/a/list.nist.gov/g/pqc-forum/c/Fm4cDfsx65s/m/F63mixuWBAAJ

In that same mail archive, the following statement was made by the same person regarding these patents:

https://groups.google.com/a/list.nist.gov/g/pqc-forum/c/Fm4cDfsx65s/m/2NzgqoTaBAAJ

After a bit of research, the patents involved appear to be available here:

https://patents.google.com/patent/CN107566121A/en

https://patents.google.com/patent/CN108173643B/en


If this information changes a view that you have already expressed during this WG Last Call, please post a follow-up message.

Thanks,
 Russ


> On Jan 8, 2025, at 3:56 PM, Russ Housley <housley@vigilsec.com> wrote:
> 
> Title: Internet X.509 Public Key Infrastructure - Algorithm Identifiers for the
>       Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM)
> Authors: S. Turner, P. Kampanakis, J. Massimo, and B. Westerbaan
> Datatracker: https://datatracker.ietf.org/doc/draft-ietf-lamps-kyber-certificates
> 
> Should the LAMPS WG ask the IESG to publish this document as a Standards-Track RFC?  Please respond to this WG Last Call by 22 January 2025.
> 
> For the LAMPS WG Chairs,
> Russ

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