Asus Sabertooth X99 User Manual page 130

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
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.
The db file must be formatted as a UEFI variable structure with time-based authenticated
variable.
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Load Default PK
This item allows you to load the downloaded PK from a USB storage
device.
Delete KEK
This item allows you to delete the KEK from your system.
Configuration options: [Yes] [No]
Load Default KEK
This item allows you to load the downloaded KEK from a USB storage
device.
Append Default KEK
This item allows you to load the additional KEK from a storage device for
an additional db and dbx loaded management.
Delete db
This item allows you to delete the db file from your system.
Configuration options: [Yes] [No]
Load Default db
This item allows you to load the downloaded db from a USB storage
device.
Append Default db
This item allows you to load the additional db from a storage device so that
more images can be loaded securely.
® Secure Boot Key-Enrollment Key (KEK).
Chapter 3: BIOS setup