Asus TUF Z270 MARK 1 Bios Manual page 63

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
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.
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.
Delete the dbx
This item allows you to delete the dbx file from your system.
Load Default dbx
This item allows you to load the downloaded dbx from a USB storage
device.
Configuration options: [Yes] [No]
Append Default dbx
This item allows you to load the additional dbx from a storage device so
that more db's images cannot be loaded.
The dbx file must be formatted as a UEFI variable structure with time-based authenticated
variable.
ASUS TUF Z270 MARK 1 BIOS Manual
63