TPMbased

TPMbased describes an approach to security and trust that relies on a hardware Trusted Platform Module (TPM). In TPM-based designs, cryptographic keys, certificates, and measured state about the platform are stored or computed within the TPM or using its secure environment, providing a hardware-backed root of trust for the system.

Core capabilities include secure key storage, cryptographic operations performed inside the TPM, and platform attestation. TPM-based systems use Platform Configuration Registers (PCRs) to record measurements of software and firmware; these measurements can be sealed to specific platform states, or used to prove integrity to remote parties.

Common applications include secure boot and measured boot, disk encryption where the TPM protects keys used to unlock encrypted volumes, and enterprise identity and access control through remote attestation and attested device health. TPM-based attestation helps distinguish trusted devices from compromised ones in network access or software deployment scenarios.

Implementation considerations include hardware availability and TPM version (1.2 vs 2.0), interoperability across platforms, and the need for compatible operating system and management tooling. Although TPM-based security enhances resilience, it introduces management complexity, requires careful policy design, and may raise privacy concerns when used for remote attestation.

Limitations and risks include potential TPM firmware vulnerabilities, limited recovery options if the TPM becomes unavailable, and reliance on correct configuration of PCRs and sealing policies. TPMbased is typically one component of a broader defense-in-depth strategy rather than a standalone solution.