seL4 (security enhanced L4) is an open-source, high-assurance, capability-based microkernel. It inherits the performance and design characteristics of the L4 microkernel lineage but is implemented using high-assurance methods. seL4 uses formal mathematical verification to prove the system's confidentiality, integrity, availability among other properties. The initial paper outlining seL4's verification was inducted into the 2019 ACM SIGOPS Hall of Fame. seL4 was developed as a from-scratch microkernel design influenced by the L4 microkernel family, with an explicit goal of enabling comprehensive formal verification while maintaining high performance. In 2009, the seL4 project reported a machine-checked proof of functional correctness spanning from formal specification to C implementation. More information...
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