Cryptographic attestation is a proof mechanism that lets one party verify that a system is running trusted code inside a genuine protected environment, such as a Trusted Execution Environment (TEE). The protected system produces a signed measurement of its hardware state, firmware, or loaded code, and a verifier checks that evidence against expected values.
This matters in cyber security because it turns “trust me” into something testable. In confidential computing and private AI processing, attestation helps prove that prompts or secrets are handled by the right enclave, not by an altered server or emulator. Defenders use it to enforce remote trust before releasing keys or data. Attackers try to bypass it by tampering with firmware, spoofing measurements, or exploiting weak verification logic, which is why attestation must be paired with strong key management and a correct trust policy.