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A Logic of Secure Systems and its Application to Trusted Computing

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4 Author(s)

We present a logic for reasoning about properties of secure systems. The logic is built around a concurrent programming language with constructs for modeling machines with shared memory, a simple form of access control on memory, machine resets, cryptographic operations, network communication, and dynamically loading and executing unknown (and potentially untrusted) code. The adversary's capabilities are constrained by the system interface as defined in the programming model (leading to the name CSI -ADVERSARY). We develop a sound proof system for reasoning about programs without explicitly reasoning about adversary actions. We use the logic to characterize trusted computing primitives and prove code integrity and execution integrity properties of two remote attestation protocols. The proofs make precise assumptions needed for the security of these protocols and reveal an insecure interaction between the two protocols.

Published in:

Security and Privacy, 2009 30th IEEE Symposium on

Date of Conference:

17-20 May 2009