Dell OptiPlex 5270 All-in-One Setup and specifications guide

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Secure boot screen options

Option
Description
Secure Boot Enable
This option enables or disables the Secure Boot feature.
  • Disabled
  • Enabled

Default setting: Enabled.

Secure Boot Mode
Changes to the Secure Boot operation mode and modifies the behavior of Secure Boot to allow evaluation or enforcement of UEFI driver signatures.
  • Deployed Mode- This option is enabled by default
  • Audit mode
Expert Key Management
Allows you to manipulate the security key databases only if the system is in Custom Mode. The Enable Custom Mode option is disabled by default. The options are:
  • PK
  • KEK
  • db
  • dbx
If you enable the Custom Mode, the relevant options for PK, KEK, db, and dbx appear. The options are:
  • Save to File—Saves the key to a user-selected file
  • Replace from File—Replaces the current key with a key from a user-selected file
  • Append from File—Adds a key to the current database from a user-selected file
  • Delete—Deletes the selected key
  • Reset All Keys—Resets to default setting
  • Delete All Keys—Deletes all the keys
NOTE: If you disable the Custom Mode, all the changes made will be erased and the keys will restore to default settings.

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