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Title:
Symbolic Models for Isolated Execution Environments
Authors: Charlie Jacomme, Steve Kremer, Guillaume Scerri
Abstract:Isolated Execution Environments (IEEs), such as ARM TrustZone and Intel SGX, offer the possibility to execute sensitive code in isolation from other malicious programs, running on the same machine, or a potentially corrupted OS. A key feature of IEEs is the ability to produce reports binding cryptographically a message to the program that produced it, typically ensuring that this message is the result of the given program running on an IEE. We present a symbolic model for specifying and verifying applications that make use of such features. For this we introduce the S$\ell$APiC process calculus, that allows to reason about reports issued at given locations. We also provide tool support, extending the SAPiC/Tamarin toolchain and demonstrate the applicability of our framework on several examples implementing secure outsourced computation (SOC), a secure licensing protocol and a one-time password protocol that all rely on such IEEs.
ePrint: https://eprint.iacr.org/2017/070
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