Dell Latitude 7220EX Rugged Extreme Tablet Service Manual - Page 16

Secure boot

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Option Absolute OROM Keyboard Access Admin Setup Lockout Master Password Lockout SMM Security Mitigation Secure boot Table 4. Secure Boot Option Secure Boot Enable Secure Boot Mode Expert key Management Description • PPI Bypass for Clear Commands • Attestation Enable (default) • Key Storage Enable (default) • SHA-256 (default) Choose any one option: • Disabled • Enabled (default) 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 selected by default. Description Allows you to enable or disable Secure Boot feature • Secure Boot Enable Option is selected by default. 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 16 System setup

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Option
Description
•
PPI Bypass for Clear Commands
•
Attestation Enable (default)
•
Key Storage Enable (default)
•
SHA-256 (default)
Choose any one option:
•
Disabled
•
Enabled (default)
Absolute
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
OROM Keyboard Access
This option determines whether users are able to enter Option ROM configuration screen via
hotkeys during boot.
•
Enabled (default)
•
Disabled
•
One Time Enable
Admin Setup Lockout
Allows you to prevent users from entering Setup when Admin password is set. This option is not set
by default.
Master Password Lockout
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.
SMM Security Mitigation
Allows you to enable or disable additional UEFI SMM Security Mitigation protections. This option is
selected by default.
Secure boot
Table 4. Secure Boot
Option
Description
Secure Boot Enable
Allows you to enable or disable Secure Boot feature
•
Secure Boot Enable
Option is selected by default.
Secure Boot Mode
Allows you to modify the behavior of Secure Boot to allow evaluation or enforcement of UEFI
driver signatures.
•
Deployed Mode (default)
•
Audit Mode
Expert key Management
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
16
System setup