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Proving the Absence of Microarchitectural Timing Channels

25 October 2023
Scott Buckley
Robert Sison
Nils Wistoff
Curtis Millar
Toby C. Murray
Gerwin Klein
Gernot Heiser
    AI4TS
ArXiv (abs)PDFHTML
Abstract

Microarchitectural timing channels are a major threat to computer security. A set of OS mechanisms called time protection was recently proposed as a principled way of preventing information leakage through such channels and prototyped in the seL4 microkernel. We formalise time protection and the underlying hardware mechanisms in a way that allows linking them to the information-flow proofs that showed the absence of storage channels in seL4.

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