Re: Module signing and post-quantum crypto public key algorithms

David Howells
2025-11-07T10:04:03Z

Stefan Berger <stefanb@linux.ibm.com> wrote:

> On 6/16/25 1:27 PM, Simo Sorce wrote:
> > Of course we can decide to hedge *all bets* and move to a composed
> > signature (both a classic and a PQ one), in which case I would suggest
> > looking into signatures that use ML-DSA-87 + Ed448 or ML-DSA-87 + P-521
> > ,ideally disjoint, with a kernel policy that can decide which (or both)
> > needs to be valid/checked so that the policy can be changed quickly via
> > configuration if any of the signature is broken.
>
> FYI: based on this implementation of ML-DSA-44/65/87
>
> https://github.com/IBM/mlca/tree/main/qsc/crystals

The problem with that is that the Apache-2 licence is incompatible with GPLv2.
Now, it might be possible to persuade IBM to dual-license their code.

David