Table 35. System Security details (continued)
Option
Description
Secure Boot
Enables Secure Boot, where the BIOS authenticates each pre-boot image by using the
certificates in the Secure Boot Policy. Secure Boot is set to
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 Boot policy is set to
Standard
by
default.
Secure Boot Mode
Configures how the BIOS uses the Secure Boot Policy Objects (PK, KEK, db, dbx).
If the current mode is set to
Deployed Mode
, the available options are
User Mode
and
Deployed Mode
. If the current mode is set to
User Mode
, the available options are
User
Mode
,
Audit Mode
, and
Deployed Mode
.
Table 36. Secure Boot Mode
Options
Descriptions
User Mode
In
User Mode
, PK must be installed, and BIOS performs signature
verification on programmatic attempts to update policy objects.
The BIOS allows unauthenticated programmatic transitions between modes.
Deployed
Mode
Deployed Mode
is the most secure mode. In
Deployed Mode
, PK must be
installed and the BIOS performs signature verification on programmatic
attempts to update policy objects.
Deployed Mode
restricts the programmatic mode transitions.
Audit Mode
In
Audit mode
, PK is not present. The BIOS does not authenticate
programmatic updates to the policy objects, and transitions between modes.
The BIOS performs a signature verification on pre-boot images and logs the
results in the image Execution Information Table, but runs the images
whether they pass or fail verification.
Audit Mode
is useful for programmatic determination of a working set of
policy objects.
Secure Boot Policy Summary
Specifies the list of certificates and hashes that secure boot uses to authenticate images.
Secure Boot Custom Policy
Settings
Configures the Secure Boot Custom Policy. To enable this option, set the Secure Boot Policy to
Custom
option.
Table 37. System Security details
Option
Description
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 image by using the
certificates in the Secure Boot Policy. Secure Boot is set to
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 Boot policy is set to
Standard
by
default.
46
Pre-operating system management applications
