Proofcraft News - 2025

Gerwin presents the next 700 verified seL4 platforms at the seL4 summit

Proofcraft’s Chief Scientist Gerwin Klein presented at this year’s seL4 summit held in Prague, Czech Republic on September 3rd 2025, where Proofcraft was a Silver sponsor.

In his talk (soon to appear on seL4’s Youtube channel), Gerwin shared exciting news: in the next seL4 release, the formal proofs for seL4 will cover 100% of the Arm platforms it supports.

In the same project, which is part of the DARPA’s PROVERS program, Proofcraft is also investigating how to extend the proofs to a larger number of configuration options. If successful, this could expand the configuration space the proofs apply for to over a trillion different individual option combinations.

Proofcraft Silver sponsor of the seL4 summit 2025

Proofcraft is proud to be sponsoring the 2025 seL4 summit as a Silver sponsor.

The seL4 summit is an annual international gathering of participants from industry, government and universities with interests in the world’s most highly assured OS kernel. Attendees and presenters include the creators and maintainers of the seL4 technology such as the Proofcraft team.

This year’s seL4 summit will be held in Prague, Czech Republic, on Sep 3-5, 2025.

4 years since the creation of Proofcraft

Proofcraft is celebrating its 4th year anniversary, still enjoying pushing the limits of verified software, with multiple multi-year projects started in the last year!

Pushing the availability and ability to use verified software for non-experts, in DARPA’s PROVERS program. Pushing verified software in areas where using multiple processors is imperative for high performance, in Cyberagentur’s ÖvIT program. And continuing to push the verification of seL4 on AArch64 with further funding from NCSC.

Many exciting developments to come.

Proofcraft recipient of Cyberagentur funding for verification of seL4 multikernel

Proofcraft, partnering with Kry10, is one of the 5 recipients of Germany’s Cyberagentur’s Ecosystem trustworthy IT research program (ÖvIT).

Kry10 and Proofcraft partner to deliver dynamism, performance, and proof for complex cyber-physical systems. The project will enable: over-the-air updates using dynamic configurations; high performance using multiple cores; and high security assurance using rigorous design and formal verification.

In particular, Proofcraft will extend the seL4 microkernel proofs to support a static multikernel configuration, where applications can benefit from the use of multiple CPU cores for performance, while at the kernel level a separate instance of seL4 run on each core.

At ÖvIT kick-off meeting on January 20th, 2025, at Leopoldina National Academy of Sciences in Halle (Saale) Germany, June Andronick presented Proofcraft’s contribution to the program, together with Matthew Brecknell from Kry10, while Boyd Multerer, CEO of Kry10, presented the vision for the whole project.