Asus A88XM-A - Manual (Page 60)

2-28 Chapter 2: BIOS information
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).
Key-exchange Key (KEK) refers to Microsoft ® Secure Boot Key-Enrollment Key (KEK).
Delete the KEK
Allows you to delete the KEK from your system. Configuration options: [Yes] [No]
Load KEK from File
Allows you to load the downloaded KEK from a USB storage device.
Append KEK from file
Allows you to load the additional KEK from a storage device for an additional db and
dbx loaded management.
The KEK file must be formatted as a UEFI variable structure with time-based authenticated
variable.
DB Management
The db (Authorized Signature database) lists the signers or images of UEFI
applications, operating system loaders, and UEFI drivers that you can load on the
single computer.
Delete the db
Allows you to delete the db file from your system. Configuration options: [Yes] [No]
Load db from File
Allows you to load the downloaded db from a USB storage device.
Append db from file
Allows you to load the additional db from a storage device so that more images can
be loaded securely.