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Gernot Heiser

@microkerneldude.bsky.social
240 followers 26 following 86 posts

Physicist by training, computer engineer by passion Scientia (distinguished) Professor and John Lions Chair of Operating Systems at UNSW Sydney and Founding Chairman of the seL4 Foundation FACM FIEEE FTSE FRSN ML

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Gernot Heiser @microkerneldude.bsky.social · 22/09/2026
RIP SMP kernel In my #seL4 Summit talk I also examined performance of the SMP vs multikernel, in the process eating my words from 11 years ago, claiming that an SMP kernel was better for closely-coupled cores (see trustworthy.systems/publications...). Multikernel is the way to go!
trustworthy.systems
TS | For a microkernel, a big lock is fine
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Gernot Heiser @microkerneldude.bsky.social · 22/09/2026
WCET Reborn In my talk at the #seL4 Summit I discussed how we have re-established seL4’s worst-case execution-time (WCET) analysis, making it, once more, the only protected-mode OS with a sound and complete timing analysis. trustworthy.systems/publications...
trustworthy.systems
TS | Trustworthy Systems R&D update
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Gernot Heiser @microkerneldude.bsky.social · 18/09/2026
Great to see ANU joining the #seL4 Foundation, in line with the collaboration between Trustworthy Systems and the FM/PL folks at ANU, all around #seL4 and #LionsOS sel4.systems/news/#09-18
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 17/09/2026
Have you ever seen Windows-1 running on a microkernel? Here you can see it running on #seL4 & #LionsOS: trustworthy.systems/publications...
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Gernot Heiser @microkerneldude.bsky.social · 16/09/2026
The slides and videos from the #seL4 Summit are now available from the program page: sel4.systems/Summit/2026/...
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Gernot Heiser @microkerneldude.bsky.social · 10/09/2026
Amazing – after 17 months, my ASPLOS/EuroSys’25 keynote recording is finally up! www.youtube.com/watch?v=12OI...
youtube.com
EUROSYS '25 + ASPLOS '25 | Joint Keynote 2 by Gernot Heiser (Univ. of New South Wales)
YouTube video by ACM SIGOPS
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Gernot Heiser @microkerneldude.bsky.social · 09/09/2026
10 Years of seL4 at The NCSC At the #seL4 Summit, Adam from the UK's National Cyber Security Centre talked about their involvement with seL4, their evaluation and approval of a device that leverages seL4's guarantees for software-enforced data separation hosted-files.sched.co/sel4summit20...
hosted-files.sched.co
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Gernot Heiser @microkerneldude.bsky.social · 03/09/2026
Microkit was developed with the explicit objective to reduce the barrier to entry for #seL4. Several speakers at the Summit today confirmed that the objective was met, this statement by Daniel from Lewis & Clak is one of them
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Gernot Heiser @microkerneldude.bsky.social · 01/09/2026
The Trustworthy Systems team have just done a major release of the Microkit, #seL4 device driver framework, #LionsOS and its virtualisation support. We can now boot Windows in a virtual machine. trustworthy.systems/news/#Softwa...
trustworthy.systems
News | TS
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Gernot Heiser @microkerneldude.bsky.social · 01/09/2026
#seL4 CEO June Andronick had just announced that next year's Summit will be held in Sydney again
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Gernot Heiser @microkerneldude.bsky.social · 01/09/2026
The #seL4 Summit in Vancouver had kicked off!
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Gernot Heiser @microkerneldude.bsky.social · 31/08/2026
Whoa - WiFi on a #Qantas long haul flight! Only 1-2 decades after everyone else!
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Gernot Heiser @microkerneldude.bsky.social · 31/08/2026
On my way to the #seL4 Summit in Vancouver. Next stop: Sydney airport...
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Gernot Heiser @microkerneldude.bsky.social · 29/07/2026
Happy #seL4 Day!
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Gernot Heiser @microkerneldude.bsky.social · 23/07/2026
New #seL4 (16.0.0) released! A matching Microkit release (2.3.0) is out as well: sel4.systems/news/#07-22
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 12/07/2026
Early-bird registration to the #seL4 Summit closes in 3 weeks! sel4.systems/Summit/2026/
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Gernot Heiser @microkerneldude.bsky.social · 07/07/2026
The program of the #seL4 Summit in Vancouver, 1–3 Sep, is out: sel4.systems/Summit/2026/...
sel4.systems
seL4 Summit 2026 Program | seL4
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Gernot Heiser @microkerneldude.bsky.social · 29/06/2026
It finally happened – the MCS variant of #seL4 is verified (on RISC-V)! Proofcraft has just finished the functional correctness proof of this most powerful version of the kernel, specifically aimed at supporting mixed-criticality real-time systems. sel4.systems/news/#mcs26
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 10/06/2026
UNSW Sydney is #hiring systems faculty – talk to me if you’re interested. This is for mid-career researchers in the AU Lecturer–Senior Lecturer–Associate Professor–Professor progression. Tenure is orthogonal to position level – closes 31 July. external-careers.jobs.unsw.edu.au/cw/en/job/54...
external-careers.jobs.unsw.edu.au
Associate Professor in Systems
Join an organisation that is shaping the future direction of modern computing systems in Australia, in a senior academic role that combines research leadership, strategic contribution, and excellence ...
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Gernot Heiser @microkerneldude.bsky.social · 10/06/2026
UNSW Sydney is #hiring systems faculty – talk to me if you’re interested. This is for early-career researchers in the AU Lecturer–Senior Lecturer–Associate Professor–Professor progression. Tenure is orthogonal to position level – closes 31 July. external-careers.jobs.unsw.edu.au/cw/en/job/54...
external-careers.jobs.unsw.edu.au
Lecturer/Senior Lecturer in Systems
Join an organisation that is shaping the future direction of modern computing systems in Australia, in an academic role that combines high-quality research, excellent teaching, and meaningful contribu...
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Gernot Heiser @microkerneldude.bsky.social · 02/06/2026
Welcome Gapfruit, latest member of the #seL4 Foundation! sel4.discourse.group/t/gapfruit-j...
sel4.discourse.group
Gapfruit joins the seL4 Foundation
We are pleased to welcome a new member - Gapfruit - to the seL4 Foundation. Gapfruit is a Swiss technology company building trustworthy foundations for the systems society depends on - from industria...
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Gernot Heiser @microkerneldude.bsky.social · 24/05/2026
Thursday was UNSW CSE Prizes Night. Several Trustworthy Systems students featured: 2nd year Sam Tyler (left) won two. New Heroes of Operating Systems are (from right) Varun Sethu and Richard Shen: high distinctions in OS, Advanced OS and OS thesis
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Gernot Heiser @microkerneldude.bsky.social · 20/05/2026
Sad to hear that Peter G Neumann has passed away, aged 93. He was a pioneer of computer security, back from the PSOS system to much more recently being one of the people behind CHERI capabilities. Very insightful, and a nice guy besides. He’ll be missed. www.linkedin.com/feed/update/...
linkedin.com
Peter G. Neumann, a pioneering computer scientist whose life work defined the field of computing risk, has died aged 93. Joining SRI in 1971 and having still worked under our Computer Science Lab… |...
Peter G. Neumann, a pioneering computer scientist whose life work defined the field of computing risk, has died aged 93. Joining SRI in 1971 and having still worked under our Computer Science Lab be...
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Gernot Heiser @microkerneldude.bsky.social · 13/05/2026
Today I had the great honour to receive the Outstanding Technical Achievement and Leadership Award of the IEEE Technical Committee on Real-Time Systems (TCRTS). www.linkedin.com/company/tech...
linkedin.com
TCRTS - Technical Committee on Real-Time Systems | LinkedIn
TCRTS - Technical Committee on Real-Time Systems | 391 followers on LinkedIn. The Technical Committee on Real-Time Systems (TCRTS) of the IEEE CS addresses real-time issues in systems design. | The T...
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Gernot Heiser @microkerneldude.bsky.social · 02/05/2026
If you’re looking for an approachable overview of seL4 etc, you might be interested in this one: trustworthy.systems/publications...
trustworthy.systems
TS | seL4: Operating systems with the reliability of mathematics
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Gernot Heiser @microkerneldude.bsky.social · 16/04/2026
Proofcraft is a Silver Spo0nsor of the #seL4 Summit – thank you Proofcraft! sel4.discourse.group/t/thank-you-...
sel4.discourse.group
Thank you Proofcraft, silver sponsor of the seL4 Summit 2026
The seL4 Foundation thanks Proofcraft, silver sponsor of the seL4 Summit 2026. Founded by the seL4 verification leaders, Proofcraft offers commercial support and projects in formal verification in ge...
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Gernot Heiser @microkerneldude.bsky.social · 15/04/2026
Riverside Research is sponsoring the #seL4 Summit – thank you, Riverside! sel4.discourse.group/t/thank-you-...
sel4.discourse.group
Thank you Riverside Research, sponsor of the seL4 Summit 2026 reception
The seL4 Foundation thanks Riverside Research for sponsoring the seL4 Summit 2026 reception. Riverside Research is a national security nonprofit serving the DOD and Intelligence Community. Through th...
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Gernot Heiser @microkerneldude.bsky.social · 13/04/2026
Seems when the AI can’t bullshit its way through, it doesn’t do so well. Who would have thought? fiducia-lang.github.io/blog/claude-...
fiducia-lang.github.io
Claude vs Student: Rocq Proof Development - Fiducia Blog
$3,000 in API costs, four failed attempts at a Rocq proof, and a student who solved it in two days. Lessons on LLMs and formal verification.
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Gernot Heiser @microkerneldude.bsky.social · 31/03/2026
#seL4 release 15.0.0 is out! Together with accompanying releases of Microkit, CAmkES, CapDL and rust-sel4. sel4.systems/news/#03-31
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 26/03/2026
Microkernels are very much at the centre of this year’s John Lions Distinguished Lecture: Hermann Härtig, Father of L4Re and NOVA (among others) will talk about “Taming the Elephant in the Basement: From L4 to M3” www.eventbrite.com.au/e/john-lions...
eventbrite.com.au
John Lions Distinguished Lecture
You're invited to attend this talk by Emeritus Prof. Hermann Härtig, Technische Universität Dresden, Computer Science Department.
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Gernot Heiser @microkerneldude.bsky.social · 18/03/2026
The #seL4 Summit will also feature Voices from Nearby. Alistair Woodmand, Board Member of the Erlang Ecosystem Foundation, on the European Cyber Resiliency Act. David Hardin, Associate Director of Systems Engineering at Collins Aerospace, on real-world formal verification. sel4.systems/news/#03-18
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 18/03/2026
This year’s #seL4 Summit in Vancouver will have two great keynotes, Anjana Rajan, Former Assistant National Cyber Director at The White House, and Martin Dehnel-Wild, Chief Scientist at Kry10. sel4.systems/news/#03-18
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 13/03/2026
Welcome Neutrality to the #seL4 Foundation! sel4.systems/news/#03-13
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 26/02/2026
Happy to share that California-based Foresight Institute has awarded us a grant for our work on bridging gap between verification of user-level components and the #seL4 specification. This will enable end-to-end verification of a complete operating system. www.linkedin.com/feed/update/...
linkedin.com
The seL4 microkernel is one of the most solid foundations for building secure systems. But to fully trust the programs running on top of it, we still need formal proofs that they behave exactly as… | ...
The seL4 microkernel is one of the most solid foundations for building secure systems. But to fully trust the programs running on top of it, we still need formal proofs that they behave exactly as int...
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Gernot Heiser @microkerneldude.bsky.social · 22/02/2026
Registration is open for this year’s #seL4 Summit in Vancouver, 1–3 September: sel4.discourse.group/t/registrati...
sel4.discourse.group
Registration open for the seL4 summit 2026
We have an exciting new format for 2026! A full first day dedicated to applications, overviews, and perspectives on seL4-based systems and formally verified software in the real world. Followed by two...
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Gernot Heiser @microkerneldude.bsky.social · 30/01/2026
First publicised use of the #seL4-based #LionsOS in a commercial product: www.linkedin.com/feed/update/...
linkedin.com
#firewalls | ExploitChance (Grupo Pentest®)
We’re pleased to announce that Numantia will be adopting LionsOS, built on the seL4 microkernel, to run a dedicated packet-filtering specific component inside our appliance. This design choice reflect...
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Gernot Heiser @microkerneldude.bsky.social · 28/01/2026
Welcome Fraunhofer AISEC to the #seL4 Foundation! sel4.systems/news/#01-28
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 28/01/2026
The Call for Presentations for the #seL4 Summit is out! sel4.systems/news/#01-23
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 18/01/2026
Riverside Research joins the seL4 Foundation sel4.systems/news/#01-19
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 27/11/2025
Recent formal-methods PD looking for an exciting opportunity? Such as living in Sydney and contributing to end-to-end verification of LionsOS? Here’s your chance: external-careers.jobs.unsw.edu.au/cw/en/job/53...
external-careers.jobs.unsw.edu.au
Research Associate/Senior Research Associate (Formal Methods)
Conduct research in the area of formal methods and systems independently and as part of the team.
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Gernot Heiser @microkerneldude.bsky.social · 22/11/2025
AI at work, with some hilarious assertions. But WHY??? investorbit.de/menschen/ger...
investorbit.de
Gerald Heiser: Ein Blick auf den führenden Experten für Betriebssysteme
Gerald Heiser ist ein Name, der in der Welt der Informatik und insbesondere im Bereich der Betriebssysteme und Cybersicherheit
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Gernot Heiser @microkerneldude.bsky.social · 13/11/2025
Interested in contributing to the #seL4 ecosystem, maybe seing your contributions deployed? Trustworthy Systems has released a firewall as a community project. It’s well-documented, easy to get started with, and there are plenty of parts to contribute. Details at trustworthy.systems/news/#lionso...
trustworthy.systems
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Gernot Heiser @microkerneldude.bsky.social · 12/11/2025
Genode Sculpt OS runs on #seL4: sel4.systems/news/#sculpt
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 06/11/2025
Spring time is Jacaranda time in Sydney – the city is full of those magnificent trees
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Gernot Heiser @microkerneldude.bsky.social · 30/10/2025
Last week we had a memorial event for my former colleague and boss Prof Paul Compton. It was captured in this video: www.youtube.com/watch?v=isq-... I was asked to summarise my memories of Paul, the are at 57:40–62:50
youtube.com
Paul Compton Memorial
YouTube video by Seb Sg
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Gernot Heiser @microkerneldude.bsky.social · 13/10/2025
The #seL4 Foundation is inviting the community to a survey on the location of next year’s #Summit: sel4.discourse.group/t/sel4-summi...
sel4.discourse.group
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Gernot Heiser @microkerneldude.bsky.social · 23/09/2025
The recordings of all presentations from this month's #seL4 Summit are up: sel4.systems/news/2025.ht...
sel4.systems
seL4 News | seL4
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Gernot Heiser @microkerneldude.bsky.social · 08/09/2025
Regrettably I didn’t take a picture, but one of the coolest talks at the #seL4 Summit was Alexander Böttcher: “Sculpt OS – a dynamic, general-purpose OS powered by Genode on seL4”. It was presented on a laptop running Sculpt OS! events.linuxfoundation.org/sel4-summit/...
events.linuxfoundation.org
Schedule | LF Events
Please note: This schedule is automatically displayed in Central European Summer Time (CEST / UTC+2). To see the schedule in your preferred timezone, please select from the drop-down menu to the right...
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Gernot Heiser @microkerneldude.bsky.social · 04/09/2025
#seL4 for secure voice communication for aircraft: Peter de Ridder from MEP at the seL4 Summit
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Gernot Heiser @microkerneldude.bsky.social · 04/09/2025
Again Kaegi at the #seL4 Summit reports on progress on verifying an IPv6 attack with a bunch of undergraduate students
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