CompTIA Security+ SY0-701 Practice Question

For existing systems the best option to add additional hardware based encryption functionalities is using a Hardware Security Module (HSM). HSM's are usually stand alone devices that can be used by other systems or expansion cards that can be added. Trusted Platform Module could provide similar functionalities but are permanently embedded into a system, so to use a TPM the systems falling under this new policy would need to be replaced with new hardware that has a TPM.