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Appendix F: Secure Boot Settings
Key Exchange Key
The Key Exchange Key (KEK), which is held by the operating system vendor, can be updated by the holder of the PK and
be used by secure boot to protect access to signatures databases. The options are Details, Export, Update, Append, and
Delete. Select Details to display detailed information of KEKs. Select Export to save the current KEKs to a FAT formatted
USB fl ash drive. Select Update to load the factory defaults or load KEKs from a fi le on the external device. Select Append
to load the factory defaults or load KEKs from a fi le on the external device. Select Delete to clear the current KEKs or
to delete only one certifi cate from the key database. (Refer to page 166 for the Export process. Refer to pages 167,
168, 169, and 170 for the Update process.)
Append: Use the arrow keys to select Append.
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