One of the main things the tpm deals with are keys — not the kind that unlock doors, but cryptographic keys that help secure your data and ensure the integrity of your device. The way external objects (like keys or data blobs) are uploaded into the tpm is that they all have a parent (which must be a storage key) and they are encrypted to the public part of this key (in tpm parlance, this is called wrapping). A tpm can have many identities
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Encrypt data, including other keys binding
Decrypt data (usually from remote platforms) legacy
Signing or encryption lower security for backwards compatibility Not recommended only usable in some commands not creatable in fips mode wrap keys! By generating the key in the tpm, we solve all of those issues The tpm stores the key material and does all the cryptographic operations on itself, so the key cannot be stolen.
Key attestation is an assurance mechanism It validates the private key in a certificate key pair are protected via a tpm If you don’t know what the big deal is about protecting keys via tpm please see part 1 and part 2 of this series. This guide shows how to create tpm backed certificates on windows.
Use the tpm to generate keys for a specific need such as fetching a virtual private network (vpn) certificate using the microsoft ca (certificate authority)
To leverage the tpm, the microsoft ca needs to be told which cryptographic service provider (csp) to use. Generate keys with the tpm provider using openssl The following commands use the.cnf files from the getting started guide Configure your connext application to use the generated keys through qos
For more information, see the 7.3.0 user manual page on providers here.
