Dell E74S Manuale di riferimento - Pagina 20

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1. System Setup

Table 22. System Security details (continued)

Option

Enable writes to

SGXLEPUBKEYHASH[3:0] from

OS/SW

Enable/Disable SGX Auto MP

Registration Agent

SGX Factory Reset

Power Button

AC Power Recovery

AC Power Recovery Delay

User Defined Delay (60 s to 600

UEFI Variable Access

In-Band Manageability Interface

SMM Security Migration

Secure Boot

Secure Boot Policy

Pre-operating system management applications

Description

Software Guard Extensions Epoch n: Sets the Software Guard Extensions Epoch

values.

Enables or disables the Enable writes to SGXLEPUBKEYHASH[3:0] from OS/SW.

SGX LE Public Key Hash0: Sets the bytes from 0-7 for SGX Launch Enclave Public

Key Hash.

SGX LE Public Key Hash1: Sets the bytes from 8-15 for SGX Launch Enclave Public

Key Hash.

SGX LE Public Key Hash2: Sets the bytes from 16-23 for SGX Launch Enclave Public

Key Hash.

SGX LE Public Key Hash3: Sets the bytes from 24-31 for SGX Launch Enclave Public

Key Hash.

Enables are disables the SGX Auto MP Registration. The MP registration agent is

responsible to register the platform.

Enables you to reset the SGX option to factory settings. This option is set to Off by

default.

Enables or disables the power button on the front of the system. This option is set to

Enabled by default.

Sets how the system behaves after AC power is restored to the system. This option is

set to Last by default.

NOTE:

The host system will not power on up until iDRAC Root of Trust (RoT) is

completed, host power on will be delayed by minimum 90 seconds after the AC

applied.

Sets the time delay for the system to power up after AC power is restored to

the system. This option is set to Immediate by default. When this option is set to

Immediate, there is no delay for power up. When this option is set to Random, the

system creates a random delay for power up. When this option is set to User Defined,

the system delay time is manually to power up.

Sets the User Defined Delay option when the User Defined option for AC Power

Recovery Delay is selected. The actual AC recovery time needs to add iDRAC root of

trust time (around 50 seconds).

Provides varying degrees of securing UEFI variables. When set to Standard (the

default), UEFI variables are accessible in the operating system per the UEFI

specification. When set to Controlled, selected UEFI variables are protected in the

environment and new UEFI boot entries are forced to be at the end of the current boot

order.

When set to Disabled , this setting hides the Management Engine's (ME), HECI devices,

and the system's IPMI devices from the operating system. This prevents the operating

system from changing the ME power capping settings, and blocks access to all in-

band management tools. All management should be managed through out-of-band. This

option is set to Enabled by default.

NOTE:

BIOS update requires HECI devices to be operational and DUP updates

require IPMI interface to be operational. This setting needs to be set to Enabled to

avoid updating errors.

Enables or disables the UEFI SMM security migration protections. It is enabled for

Windows 2022 support.

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.

When Secure Boot policy is set to Standard, the BIOS uses the system manufacturer's

key and certificates to authenticate pre-boot images. When Secure Boot policy is set to