User Manual

Chapter 4: AMI BIOS
4-47
2) EFI Time Based Authenticated Variable
When prompted, select "Yes" to load Factory Defaults or "No' to load from a fi le.
Append DBT
This item uploads and adds an Authorized Signature into the Key Management. You
may insert a factory default key or load from a fi le. When prompted, select "Yes" to
load Factory Defaults or "No' to load from a fi le.
Forbidded Signatures
This item displays the current Forbidden Signatures status.
Delete DBX
This item deletes a previously installed Forbidden Signature.
Set New DBX
This item uploads and installs a Forbidden Signature . You may insert a factory
default key or load from a fi le. The fi le formats accepted are: 1) Public Key Certifi cate
a. EFI Signature List
b. EFI CERT X509 (DER Encoded)
c. EFI CERT RSA2048 (bin)
d. EFI SERT SHA256 (bin)
2) EFI Time Based Authenticated Variable
When prompted, select "Yes" to load Factory Defaults or "No' to load from a fi le.
Append DBX
This item uploads and adds an Forbidden Signature into the Key Management. You
may insert a factory default key or load from a fi le. When prompted, select "Yes" to
load Factory Defaults or "No' to load from a fi le.