3
Option Description
TPM Status Specifies the TPM status.
TPM Command
CAUTION: Clearingthe TPMresultsinthelossofallkeysinthe TPM. ThelossofTPMkeysmay
affect
booting to the operating system.
Clears all the contents of the TPM. The TPM Clear option is set to No by default.
Intel TXT Enablesordisablesthe IntelTrustedExecution Technology(TXT) option.Toenable the IntelTXToption,
virtualization technologyand TPM Securitymust be enabled with Pre-boot measurements. This option is set
to Off bydefault.
Power Button Enables or disables the power button on the front of the system. This option is set to Enabled by default.
AC Power Recovery Sets how the system behaves after AC power is restored to the system. This option is set to Last by default.
UEFI Variable
Access
Provides varying degrees of securing UEFI variables. When set to
Standard
(the default), UEFI variables are
accessible in the operating system per the UEFI specification. When set to Controlled, selected UEFI
variables are protected in the environment and new UEFI boot entries are forced to be at the end of the
current boot order.
Secure Boot Enables Secure Boot, where the BIOS authenticates each pre-boot imagebyusing the certificates in the
Secure Boot Policy. Secure Boot is disabled by default.
Secure Boot Policy When Secure Boot policy is set to Standard, the BIOS uses the system manufacturer’s key and certificates
to authenticate pre-boot images. When Secure Boot policy is set to Custom, the BIOS uses the user-
defined key and certificates. Secure Bootpolicyissetto Standardbydefault.
Secure Boot Policy
Summary
Related links
System Security
Specifies the list of certificates and hashes that secure boot uses to authenticate images.
Viewing System Security
Secure Boot Custom Policy Settings
Secure Boot Custom Policy Settings is displayed only when Secure Boot Policy is set to Custom.
Viewing Secure Boot Custom Policy Settings
To view the Secure Boot Custom Policy Settings screen, perform the following steps:
1.
Turn on, or restart your system.
2.
Press F2 immediately after you see the following message:
F2 = System Setup
NOTE: If your operating system begins to load before you press F2, wait for the system to
finish
booting, and then
restart your system and try again.
3.
On the System Setup Main Menu screen, click System BIOS.
4.
On the System BIOS screen, click System Security.
5.
On the
System Security
screen, click
Secure Boot Custom Policy Settings
.
Secure Boot Custom Policy Settings details
The Secure Boot Custom Policy Settings screen details are explained as follows:
Option Description
Platform Key Imports, exports, deletes, or restores the platform key (PK).
Key Exchange Key
Database
Authorized
Signature Database
Enables you to import, export, delete, orrestoreentries in the KeyExchange Key(KEK) Database.
Imports, exports, deletes, or restores entries in the Authorized Signature Database (db).
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