Tool Profile

seL4

A formally verified microkernel for high-assurance systems.

At a glance:

First seen:2026-05-19

Last seen:2026-05-19

Sightings:1

Source:sel4.systems

What it is

A formally verified microkernel for high-assurance systems.

Why developers recommend it

HN commenters framed it as the modern inheritor of capability-based OS ideas.

Hacker News evidence

2026-05-19

Replies said to study seL4, called it a practical industrial proven-correct microkernel, and described its capability model in detail.

The foundations of a provably secure operating system (PSOS) (1979) [pdf]