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Security Fundamentals & Crypto · Advanced

Attestation

Process by which a device or workload provides cryptographic evidence of its identity and integrity to a verifier.

Definition

Remote attestation uses a hardware root of trust, such as a TPM or TEE, to sign measurements of the system state. The verifier compares them with expected values before granting trust or releasing secrets. It is used for device health checks, confidential computing, and supply-chain verification.

Example

A confidential VM proves via AMD SEV-SNP attestation that it runs approved code before a key service releases its decryption key.

Exam tip

Attestation proves a system is in a trusted state, often required before secrets are provided.

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