Supermicro X13SEI-TF - Page 89

Chapter 4: UEFI BIOS
89
Platform Hierarchy (Available when "Security Device Support" is set to Enable) (for
TPM Version 2.0 and above)
Select Enabled for TPM Platform Hierarchy support. This feature allows the manufacturer to
utilize the cryptographic algorithm to dene a constant key or a xed set of keys to be used for
initial system boot. These early boot codes are shipped with the platform and are included in
the list of "public keys." During system boot, the platform rmware uses the trusted public keys
to verify a digital signature in an attempt to manage and control the security of the platform
rmware used in a host system via a TPM device. The options are Disabled and Enabled.
Storage Hierarchy (Available when "Security Device Support" is set to Enable)
Select Enabled for TPM Storage Hierarchy support that is intended to be used for non-privacy-
sensitive operations by a platform owner such as an IT professional or the end user. Storage
Hierarchy has an owner policy and an authorization value, both of which can be set and are
held constant (rarely changed) through reboots. This hierarchy can be cleared or changed
independently of the other hierarchies. The options are Disabled and Enabled.
Endorsement Hierarchy (Available when "Security Device Support" is set to Enable)
Select Enabled for Endorsement Hierarchy support. This feature contains separate controls
to address your privacy concerns because the primary keys in the hierarchy are certied
by the TPM key or by a manufacturer with restrictions on how an authentic TPM device
that is attached to an authentic platform can be accessed and used. A primary key can be
encrypted and certied with a certicate created by using TPM2_ ActivateCredential, which
allows you to independently enable "ag, policy, and authorization values" without involving
other hierarchies. You can disable the endorsement hierarchy while still using the storage
hierarchy for TPM applications, permitting the platform software to use the TPM. The options
are Disabled and Enabled.
PH Randomization (for TPM Version 2.0 and above)
Select Enabled for Platform Hierarchy (PH) Randomization support. This feature is used only
during the platform developmental stage. This feature cannot be enabled in the production
platforms. The options are Disabled and Enabled.
Supermicro BIOS-Based TPM Provision Support
If this feature is set to Enabled, Supermicro BIOS-based TPM provision will be supported.
The options are Disabled and Enabled.
Note: Enabling this feature will lock your TPM on the production platform, and you will
not be able to delete the NV indexes.