Chapter 4: BIOS
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Key Exchange Keys (KEK)
This feature allows the user to enter and congure a set of values to be used as Key-
Exchange-Keys for the system. The sizes, keys numbers, and key sources of the Key-
Exchange-Keys will be indicated as well. Select Update to update your "Key Exchange
Keys". Select Append to append your "Key Exchange Keys".
Authorized Signatures (db)
This feature allows the user to enter and congure a set of values to be used as Autho-
rized 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". The settings are
Update, and Append.
Forbidden Signatures (dbx)
This feature allows the user to enter and congure a set of values to be used as Forbid-
den Signatures for the system. These values also indicate sizes, keys numbers, and key
sources of the forbidden signatures. Select Update to update your "Forbidden. Signa-
tures". Select Append to append your "Forbidden Signatures". The settings are Update,
and Append.
Authorized TimeStamps (dbt)
This feature allows the user to set and save the timestamps for the authorized signa-
tures which will indicate the time when these signatures are entered into the system.
Select Update to update your "Authorized TimeStamps". Select Append to append your
"Authorized TimeStamps". The settings are Update, and Append.
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