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Chapter 5: BIOS
Delete Forbidden Signature
This item deletes a previously installed Forbidden Signature.
Forbidden Signatures
This item uploads and installs a Forbidden Signature . You may insert a factory default key
or load from a file. The file formats accepted are: 1) Public Key Certificate
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 file.
Append Forbidden Signature
This item uploads and adds an Forbidden Signature into the Key Management. You may
insert a factory default key or load from a file. When prompted, select "Yes" to load Factory
Defaults or "No' to load from a file.
Delete Authorized TimeStamps
This item deletes a previously installed Forbidden Signature.
Authorized TimeStamps
This item uploads and installs an Authorized Time Stamp . You may insert a factory default
key or load from a file. The file formats accepted are: 1) Public Key Certificate
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 file.
Append Authorized TimeStamp
This item uploads and adds an Authorized TimeStamp into the Key Management. You may
insert a factory default key or load from a file. When prompted, select "Yes" to load Factory
Defaults or "No' to load from a file.
Delete OSRecovery Signatures
This item deletes a previously installed OS Recovery Signature.
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