Supermicro X13DEG-OA User Manual page 161

Platform Key(PK)

Use this feature to enter and configure a set of values to be used as platform firmware
keys for the system. These values also indicate the sizes, keys numbers, and the sources
of the authorized signatures. Select Update to update the platform key.
Key Exchange Keys(KEK)

Use this feature to enter and configure a set of values to be used as Key-Exchange-Keys
for the system. These values also indicate the sizes, keys numbers, and the sources of the
authorized signatures. Select Update to update your "Key Exchange Keys". Select Append
to append your "Key Exchange Keys".
Authorized Signatures(db)

Use this feature to enter and configure a set of values to be used as Authorized Signatures
for the system. These values also indicate the sizes, keys numbers, and the sources of
the authorized signatures. Select Update to update your "Authorized Signatures". Select
Append to append your "Authorized Signatures".
Forbidden Signatures(dbx)

Use this feature to enter and configure a set of values to be used as Forbidden Signatures
for the system. These values also indicate sizes, key numbers, and key sources of the
forbidden signatures. Select Update to update your "Forbidden Signatures". Select Append
to append your "Forbidden Signatures".
Authorized TimeStamps(dbt)

This feature allows you to set and save the timestamps for the authorized signatures which
will indicate the time when these signatures are entered into the system. These values also
indicate sizes, keys, and key sources of the authorized timestamps. Select Update to update
your "Authorized TimeStamps". Select Append to append your "Authorized TimeStamps".
OsRecovery Signature(dbr)

This feature allows you to set and save the authorized signatures used for OS recovery.
Select Update to update your "OS Recovery Signatures". These values also indicate sizes,
keys, and key sources of the OsRecovery signatures. Select Append to append your "OS
Recovery Signatures".
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Chapter 4: UEFI BIOS