Supermicro X11DDW-L/NT User Manual page 112

Super X11DDW-L/NT User's Manual
Platform Hierarchy (for TPM Version 2.0 and above)
Select Enabled for TPM Platform Hierarchy support which will allow the manufacturer to utilize
the cryptographic algorithm to define a constant key or a fixed 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 firmware uses the trusted public keys
to verify a digital signature in an attempt to manage and control the security of the platform
firmware used in a host system via a TPM device. The options are Enabled and Disabled.
Storage Hierarchy
Select Enabled for TPM Storage Hierarchy support that is intended to be used for non-privacy-
sensitive operations by the 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 Enabled and Disabled.
Endorsement Hierarchy
Select Enabled for Endorsement Hierarchy support, which contains separate controls to
address the user's privacy concerns because the primary keys in this hierarchy are certified
by the TPM or a manufacturer to be constrained to an authentic TPM device that is attached
to an authentic platform. A primary key can be encrypted, and a certificate can be created
using TPM2_ ActivateCredential. It allows the user to independently enable "flag, policy, and
authorization value" without involving other hierarchies. A user with privacy concerns can
disable the endorsement hierarchy while still using the storage hierarchy for TPM applications
and permitting the platform software to use the TPM. The options are Enabled and Disabled.
PH (Platform Hierarchy) Randomization (for TPM Version 2.0 and above)
Select Enabled for Platform Hierarchy Randomization support, which is used only during the
platform developmental stage. This feature cannot be enabled in the production platforms.
The options are Disabled and Enabled.
TXT Support
Select Enabled to enable Intel Trusted Execution Technology (TXT) support to enhance
system security and data integrity. The options are Disabled and Enabled.
Note 1: If the option for this item (TXT Support) is set to Enabled, be sure to disable
EV DFX (Device Function On-Hide) support for the system to work properly. (EV DFX
is under "IIO Configuration" in the "Chipset/North Bridge" submenu).
Note 2: For more information on TPM, please refer to the TPM manual at
supermicro.com/manuals/other.
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