Asus H170I-PLUS D3 User Manual page 76

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
Allows you to delete the db file from your system. Doing so may cause boot failures.
Load Default db
Select Yes to load the system default db or select No to load a downloaded db from
a USB storage device.
Append Default db
Select Yes to append the system default db or select No to append a downloaded
additional db from a USB storage device to load certain customized UEFI
executable files.
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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
Allows you to delete the DBX file from your system. Doing so may expose the
system to security threats.
Load Default dbx
Select Yes to load the system default dbx or select No to load a downloaded dbx
from a USB storage device.
Append Default dbx
Select Yes to append the system default dbx or select No to append a downloaded
additional dbx from a USB storage device to forbid certain customized UEFI
executable files.
The DBX file must be formatted as a UEFI variable structure with time‑based authenticated
variable.
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The DB file must be formatted as a UEFI variable structure with time‑based
authenticated variable.
UEFI executable files include UEFI boot devices, drivers and applications.
Chapter 2: Getting started