Computer Science > Cryptography and Security
[Submitted on 20 Aug 2023 (v1), last revised 1 Oct 2023 (this version, v3)]
Title:Towards a Formally Verified Security Monitor for VM-based Confidential Computing
View PDFAbstract:Confidential computing is a key technology for isolating high-assurance applications from the large amounts of untrusted code typical in modern systems. Existing confidential computing systems cannot be certified for use in critical applications, like systems controlling critical infrastructure, hardware security modules, or aircraft, as they lack formal verification.
This paper presents an approach to formally modeling and proving a security monitor. It introduces a canonical architecture for virtual machine (VM)-based confidential computing systems. It abstracts processor-specific components and identifies a minimal set of hardware primitives required by a trusted security monitor to enforce security guarantees. We demonstrate our methodology and proposed approach with an example from our Rust implementation of the security monitor for RISC-V.
Submission history
From: Wojciech Ozga [view email][v1] Sun, 20 Aug 2023 12:26:57 UTC (187 KB)
[v2] Tue, 22 Aug 2023 09:00:33 UTC (188 KB)
[v3] Sun, 1 Oct 2023 21:13:10 UTC (180 KB)
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