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Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <53e81761-47e1-400e-933d-0a53018c9cab@linux.ibm.com> References: <53e81761-47e1-400e-933d-0a53018c9cab@linux.ibm.com> <501216.1749826470@warthog.procyon.org.uk> <3081793dc1d846dccef07984520fc544f709ca84.camel@HansenPartnership.com> <7ad6d5f61d6cd602241966476252599800c6a304.camel@redhat.com> <69775877d04b8ee9f072adfd2c595187997e59fb.camel@HansenPartnership.com> <3d650cc9ff07462e5c55cc3d9c0da72a3f2c5df2.camel@redhat.com> To: Stefan Berger Cc: dhowells@redhat.com, Simo Sorce , James Bottomley , Ignat Korchagin , Herbert Xu , Stephan Mueller , torvalds@linux-foundation.org, Paul Moore , Lukas Wunner , Clemens Lang , David Bohannon , Roberto Sassu , keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Module signing and post-quantum crypto public key algorithms Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <61527.1762509829.1@warthog.procyon.org.uk> Date: Fri, 07 Nov 2025 10:03:49 +0000 Message-ID: <61528.1762509829@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Stefan Berger 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