Asus Z77-A - Manual (Page 84)

Chapter 2: BIOS information 2-38
2.7.10 Secure Boot
This option allows you to configure the Secure Boot related parameters.
OS Type [Other OS]
Configuration option: [Windows UEFI mode] [Other OS]
Secure Boot Mode [Standard]
This item appears only when you set the OS Type to [Windows UEFI]. Configuration option:
[Standard] [Custom]
The following items appear when Secure Boot Mode is set to [Custom].
Key Management
Manage the Secure Boot Keys (PK, KEK, DB, DBX)
Install default Secure Boot Keys
Configuration options: [Yes] [No]
Platform Key (PK)
Load PK from File
Configuration options: [Acpi (a0341d0, 0)\PCI (1212)\USB (2, 0)\]
Copy PK to File
Configuration options: [OK]
Delete PK
Configuration options: [Yes] [No]
KEK Management (KEK)
Load KEK from File
Configuration options: [OK]
Copy KEK to File
Configuration options: [OK]
Delete the KEK
Configuration options: [Yes] [No]
Append KEK from File
Configuration options: [OK]