Appendix F: Secure Boot Settings
189
Forbidden Signatures
Forbidden Signature Database (DBX
), which is the inverse of DB, contains forbidden certificates and digital signatures.
The options are
Details
, Export, Update, Append, and Delete. Select Details to display detailed information of Forbidden
Signatures. Select Export to save the current DBX
to a FAT formatted USB flash drive. Select Update to load the factory
defaults or load DBX
from a file on the external device. Select Append to add variables to the existing
DBX. Select Delete
to clear the current DBX
or to delete only one certificate from the key database. (Refer to page
cess. Refer to pages 181, 182, 183, and 184 for the Update process. Refer to pages 185 and 186 for the Append
process. Refer to page 187 for the Delete process.)
