Asus H81T - Manual (Page 65)

ASUS H81T 2-37
OS Type [Windows UE...]
Allows you to select your installed operating system.
[Windows UEFI mode]
Executes 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, Windows ® Vista/XP, or other Microsoft ® Secure Boot
non-compliant OS. Only on Windows ® UEFI mode that Microsoft ®
Secure Boot can function properly.
The following item appears when OS Type is set to [Windows UEFI mode].
Key Management
This item appears only when you set Secure Boot Mode to [Custom]. It allows you to manage
the Secure Boot keys.
Install Default Secure Boot keys
Allows you to immediately load the default Security Boot keys, Platform key (PK),
Key-exchange Key (KEK), Signature database (db), and Revoked Signatures (dbx).
The Platform Key (PK) state will change from Unloaded mode to Loaded mode. The
settings are applied after reboot or at the next reboot.
Key-exchange Key (KEK) refers to Microsoft ® Secure Boot Key database (KEK).
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 appears only when you load the default Secure Boot keys. This item allows
you to save all default Secure Boot keys.
PK Management
The Platform Key (PK) locks and secures the firmware from any non-permissible
changes. The system verifies 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. Configuration options:
[Yes] [No]
Load PK from File
Allows you to load the downloaded PK from a USB storage device.
The PK file 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).