Asus SABERTOOTH 990FX/GEN3 R2.0 User Manual page 105

PK Management
The Platform Key (PK) locks and secures the firmware from any permissible changes.
The system verifies the PK before your system enters the OS.
Load PK from File
Allows you to load the downloaded PK from a USB storage device.
Copy PK to File
Allows you to store the PK to a USB storage device.
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]
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
Load KEK from File
Allows you to load the downloaded KEK from a USB storage device.
Copy KEK to File
Allows you to store the KEK to 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.
Delete the KEK
Allows you to delete the KEK from your system.
Configuration options: [Yes] [No]
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.
Load db from File
Allows you to load the downloaded db from a USB storage device.
Copy db from file
Allows you to store the db to a USB storage device.
ASUS SABERTOOTH 990FX/GEN3 R2.0
Secure Boot Key-Enrollment Key (KEK).
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