Asus Z87-WS User Manual page 121

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.
Configuration options: [Yes] [No]
Load db from File
Allows you to load the downloaded db from a USB storage device.
Append db from File
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
Allows you to delete the dbx file from your system.
Load dbx from File
Allows you to load the downloaded dbx from a USB storage device.
Configuration options: [Yes] [No]
Append dbx from File
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.
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