Root Key

Noun · Security & Infosec

Definitions

  1. A top-level cryptographic key on which other keys, signatures, or trust relationships ultimately depend. Root keys are used in PKI, secure boot, HSM hierarchies, and device trust models, and their compromise can invalidate an entire chain of trust.

    In plain English: A top-level cryptographic key that other trust decisions depend on.

    Example: "The firmware trust model anchored every update decision in a hardware-protected root key burned into the device at manufacture."

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