Trustworthy Systems

Welcome to Trustworthy Systems!

(Most of) Trustworthy Systems in December 2021.

We are the Trustworthy Systems Group

We research techniques for the design, implementation and verification of secure and performant real-world computer systems.

We achieve impact by fundamentally changing how software systems are engineered in the real world. Our techniques provide the highest possible degree of assurance—the certainty of mathematical proof—while being cost-competitive with traditional low- to medium-assurance systems.

Our research brings together a unique combination of expertise in operating systems, formal methods and programming languages. Our seL4 microkernel is the most thoroughly verified operating system kernel in the world.

Our work goes beyond research. We show how to build robust, high-performance software stacks for the software development community, and also engage with other organisations to apply our technology to real problems.

Our main activities


Breakthroughs that combine our expertise in operating systems, formal methods and programming languages.

seL4 call graph


We apply our unique research and engineering experience to solve problems in the real world.


Additional resources


The world's most highly-assured operating system kernel.

seL4 logo


Our software and proof repositories, as well as packaged software releases.


For students

Info for prospective students and interns, and courses we teach.



Our research publications and tech reports.


Latest news

2022-09-20 – The first Summit organised by the seL4 Foundation will take place 10–13 October in Munich, Germany. TS will have a prominent role, with a total of 5 contributions: TS Leader Gernot Heiser will deliver a keynote on the state of seL4-related research. Zoltan Kocsis will present t...

2022-08-18 – TS group leader Gernot Heiser has been elected a Fellow of the Royal Society of New South Wales , the oldest learned society of the Southern hemisphere.

2022-06-22 – The British government backs UNSW Sydney researchers to advance their world-leading cyber security technology, which protects critical computer systems from cyber attacks. The United Kingdom's National Cyber Security Centre (NCSC) will fund UNSW Engineering’s Tru...