Trusted Execution Environments are quickly becoming a preferred method for providing isolation between secure and non-secure execution environments. The protection of these environments, as well as their software structure, is still a primary area of interest and research. The abililty to use a Physically Unclonable Function to generate a unique-per-device AES key provides an excellent mechanism for protection of a Trusted Execution Environment at rest through encryption. These keys can also be used to manage modification of the TEE during execution. In this paper, we present an new methodology for how this protection can be achieved, as well as a framework for the incorporation of Physically Unclonable Functions into cryptographic engines.
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