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Dell Technologies VEP4600 BIOS User guide

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System Security Settings details

About this task

The System Security Settings screen details are explained as follows:
Secure Boot
Enables Secure Boot, where the BIOS authenticates each pre-boot image by using the certificates in the Secure Boot Policy. Secure Boot is set to Disabled by default.
Secure Boot Policy
When Secure Boot policy is set to Standard, the BIOS uses the system manufacturer key and certificates to authenticate pre-boot images. When Secure Boot policy is set to Custom, the BIOS uses the user-defined key and certificates. Secure Boot policy is set to Standard by default.
Secure Boot Mode
Enables you to configure how the BIOS uses the Secure Boot Policy Objects (PK, KEK, db, dbx).

If the current mode is set to Deployed Mode, the available options are User Mode and Deployed Mode. If the current mode is set to User Mode, the available options are User Mode, Audit Mode, and Deployed Mode.

Options
Description
User Mode

In User Mode, PK must be installed, and BIOS performs signature verification on programmatic attempts to update policy objects.

BIOS allows unauthenticated programmatic transitions between modes.

Audit Mode

In Audit mode, PK is not present. BIOS does not authenticate programmatic updates to the policy objects, and transitions between modes.

Audit Mode is useful for programmatically determining a working set of policy objects.

BIOS performs signature verification on pre-boot images and logs the results in the image Execution Information Table, but approves the images whether they pass or fail verification.

Deployed Mode

Deployed Mode is the most secure mode. In Deployed Mode, PK must be installed and the BIOS performs signature verification on programmatic attempts to update policy objects.

Deployed Mode restricts the programmatic mode transitions.

Secure Boot Policy Summary
Specifies the list of certificates and hashes that Secure Boot uses to authenticate images.
Secure Boot Custom Policy Settings
Configures the Secure Boot Custom Policy. To enable this option, set the Secure Boot Policy to Custom.

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