Dell Precision 3551 Setup and specifications guide

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Secure boot

Table 1. Secure BootThe following table describes the information about the computer’s secure boot:
Option	Description
Secure Boot Enable	Allows you to enable or disable Secure Boot feature Secure Boot Enable Option is not selected.
Secure Boot Mode	Allows you to modify the behavior of Secure Boot to allow evaluation or enforcement of UEFI driver signatures. Deployed Mode (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 (default) 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.