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Provably trustworthy systems.

Gerwin Klein1,2, June Andronick3,2, Gabriele Keller3,2

  • 1Data61, CSIRO, Sydney, Australia gerwin.klein@data61.csiro.au.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|September 6, 2017
PubMed
Summary
This summary is machine-generated.

We developed methods to build trustworthy systems using formal, machine-checkable proof, even for operating system kernels. This work scales verification to larger applications, ensuring software reliability.

Keywords:
Cogentcode/proof co-generationproof engineeringseL4

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Area of Science:

  • Computer Science
  • Software Engineering
  • Formal Methods

Background:

  • Building trustworthy software systems is challenging, especially at the operating system kernel level.
  • Formal verification methods offer a path to high assurance but face scalability issues.

Purpose of the Study:

  • To present recent advancements in building and scaling trustworthy systems using formal, machine-checkable proof.
  • To demonstrate techniques for applying formal verification from the ground up, including to binary machine code.
  • To address the scalability of formal verification for larger, complex systems.

Main Methods:

  • Overview of the seL4 microkernel verification process and its application in building verified systems.
  • Introduction of proof engineering techniques to estimate verification effort for complex software.
  • Development of code/proof co-generation methods for scalable, provably trustworthy application development.

Main Results:

  • Demonstrated the feasibility of verifying operating system kernels using formal methods.
  • Presented practical techniques for scaling formal verification efforts.
  • Showcased a scalable approach to developing trustworthy applications with formal guarantees.

Conclusions:

  • Formal verification, when applied systematically, can yield highly trustworthy systems.
  • Proof engineering and co-generation are key to scaling formal methods for real-world software.
  • This work contributes to the development of verified trustworthy software systems.