Which term determines the integrity of a TPM chip?

• A. Attestation (Authentication)
• B. Identity Proofing
• C. Hash Digest
• D. Attestation Integrity Key

Answer: (D)

Attestation is how a TPM proves its trusted state by signing measurements of its configuration (PCRs). The key point is that to guarantee the trustworthiness of that attestation, the evidence must be protected by a cryptographic key dedicated to attestation. The Attestation Integrity Key is the key that ensures the integrity of the attestation data itself, preventing tampering and tying the signed quote to this specific TPM. Other options describe processes (authentication, proofing) or the hash value used in measurements, but they don’t directly guarantee the integrity of the attestation evidence. So the term that directly determines the TPM’s integrity in this context is the Attestation Integrity Key.