Asus ROG STRIX Z490-H GAMING Bios Manual page 58

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.
DBX Management
The dbx (Revoked Signature database) lists the forbidden images of db items that are
no longer trusted and cannot be loaded.
58
Save to file
This item allows you to save the KEK to a USB storage device.
Set New key
This item allows you to load the downloaded KEK from a USB storage
device.
Append Key
This item allows you to load the additional KEK from a storage device for
an additional db and dbx loaded management.
Delete key
This item allows you to delete the KEK from your system.
Configuration options: [Yes] [No]
Save to file
This item allows you to save the db to a USB storage device.
Set New key
This item allows you to load the downloaded db from a USB storage
device.
Append Key
This item allows you to load the additional db from a storage device for an
additional db and dbx loaded management.
Delete key
This item allows you to delete the db file from your system.
Configuration options: [Yes] [No]
Save to file
This item allows you to save the dbx to a USB storage device.
Secure Boot Key-Enrollment Key (KEK).
®
ROG STRIX Z490-H GAMING BIOS Manual