Abstract
This chapter introduces the root of trust. It then discusses ideas of measurement and chain of trust. These ideas are used to demonstrate trusted and authenticated boot, remote attestation, and data sealing. The chapter also presents ideas regarding runtime attestation and continuous attestation. It next presents ideas for use of PUFs as root of trust. It also introduces ideas, and shortcomings, of using authentication for limiting what code can execute in the TCB or TEE. The chapter closes with a list of assumptions about the root of trust.
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