Secure Boot - Dell Latitude 5400 Service Manual

Table 6. Security (continued)
Option
Absolute
OROM Keyboard Access
Admin Setup Lockout
Master Password Lockout
SMM Security Mitigation

Secure boot

Table 7. Secure Boot
Option
Secure Boot Enable
Secure Boot Mode
Expert key Management
Description
This field lets you Enable, Disable or Permanently Disable the BIOS module interface of the
optional Absolute Persistence Module service from Absolute Software.
● Enabled - This option is selected by default.
● Disabled
● Permanently Disabled
This option determines whether users are able to enter Option ROM configuration screen via
hotkeys during boot.
● Enabled (default)
● Disabled
● One Time Enable
Allows you to prevent users from entering Setup when Admin password is set. This option is
not set by default.
Allows you to disable master password support Hard Disk passwords need to be cleared
before the settings can be changed. This option is not set by default.
Allows you to enable or disable additional UEFI SMM Security Mitigation protections. This
option is not set by default.
Description
Allows you to enable or disable Secure Boot feature
● Secure Boot Enable
Option is not selected.
Allows you to modify the behavior of Secure Boot to allow evaluation or enforcement of
UEFI driver signatures.
● Deployed Mode (default)
● Audit Mode
Allows you to manipulate the security key databases only if the system is in Custom Mode.
The Enable Custom Mode option is disabled by default. The options are:
● PK (default)
● KEK
● db
● dbx
If you enable the Custom Mode, the relevant options for PK, KEK, db, and dbx appear.
The options are:
● Save to File- Saves the key to a user-selected file
● Replace from File- Replaces the current key with a key from a user-selected file
● Append from File- Adds a key to the current database from a user-selected file
● Delete- Deletes the selected key
● Reset All Keys- Resets to default setting
● Delete All Keys- Deletes all the keys
NOTE: If you disable the Custom Mode, all the changes made will be erased and the
keys will restore to default settings.
BIOS setup 125