Asus STRIX Z270E GAMING Bios Manual page 64

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.
The dbx file must be formatted as a UEFI variable structure with time-based authenticated
variable.
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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.
Set New key
This item allows you to load the downloaded dbx from a USB storage
device.
Append Key
This item allows you to load the additional dbx from a storage device for an
additional db and dbx loaded management.
Delete key
This item allows you to delete the dbx file from your system.
Configuration options: [Yes] [No]
ASUS STRIX Z270E GAMING BIOS Manual