Supermicro X13DEG-OA User Manual page 137

Security Device Support
Select Enable to enable BIOS support for onboard security devices, which are not displayed
in the OS. If this feature is set to Enable, TCG EFI protocol and INT1A interface will not be
available. The options are Disable and Enable.
*When "Security Device Support" is set to Enable, the following information is displayed:
•
Active PCR banks
•
Available PCR banks
SHA-1 PCR Bank (Available when "Security Device Support" is set to Enable)
Select Enabled to enable SHA-1 PCR Bank support to enhance system integrity and data
security. The options are Enabled and Disabled.
SHA256 PCR Bank (Available when "Security Device Support" is set to Enable)
Select Enabled to enable SHA256 PCR Bank support to enhance system integrity and data
security. The options are Enabled and Disabled.
Pending Operation (Available when "Security Device Support" is set to Enable)
Use this feature to schedule a TPM-related operation to be performed by a security (TPM)
device at the next system boot to enhance system data integrity. The options are None and
TPM Clear.
Note: Your system will reboot to carry out a pending TPM operation.
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 which allows 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 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.
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Chapter 4: UEFI BIOS