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ASUS Z97I-PLUS
3-49
Chapter 3
Secure Boot
Allows you to congure the Windows Secure Boot settings and manage its keys to protect the
system from unauthorized access and malwares during POST.
OS Type [Windows UEFI mode]
[Windows UEFI
Mode]
Allows you to select your installed operating system. Execute
the Microsoft
®
Secure Boot check. Only select this option when
booting on Windows
®
UEFI mode or other Microsoft
®
Secure
Boot compliant OS.
[Other OS]
Get the optimized function when booting on Windows
®
non-
UEFI mode and Microsoft
®
Secure Boot non-compliant OS.
Microsoft
®
Secure Boot only supports Windows
®
UEFI mode.
Key Management
This item allows you to manage the Secure Boot keys.
Install Default Secure Boot keys
This item allows you to immediately load the default Security Boot keys,
Platform key (PK), Key-exchange Key (KEK), Signature database (db), and
Revoked Signatures (dbx). When the default Secure boot keys are loaded,
the PK state will change from Unloaded mode to loaded mode.
Clear Secure Boot keys
This item appears only when you load the default Secure Boot keys. This
item allows you to clear all default Secure Boot keys.
Save Secure Boot Keys
This item allows you to save the PK (Platform Keys) to a USB storage
device.
PK Management
The Platform Key (PK) locks and secures the rmware from any permissible changes.
The system veries the PK before your system enters the OS.
Delete PK
Allows you to delete the PK from your system. Once the PK is deleted, all
the system’s Secure Boot keys will not be active.
Load Default PK
Select Yes to load the system default PK or select No to load a downloaded
PK from a USB storage device.
The PK le must be formatted as a UEFI variable structure with time-based authenticated
variable.
KEK Management
The KEK (Key-exchange Key or Key Enrollment Key) manages the Signature database
(db) and Revoked Signature database (dbx).
Key-exchange Key (KEK) refers to Microsoft
®
Secure Boot Key-Enrollment Key (KEK).