Dell PowerEdge MX750c EMC BIOS and UEFI Reference Guide - Page 19

Table 22. System Security details (continued) Option Description selecting Change to New random Owner EPOCHs, the selection reverts back to Manual User Defined Owner EPOCHs. Software Guard Extensions Epoch n: Sets the Software Guard Extensions Epoch values. Enable writes to SGXLEPUBKEYHASH[3:0] from OS/SW 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. Enable/Disable SGX Auto MP Registration Agent Enables are disables the SGX Auto MP Registration. The MP registration agent is responsible to register the platform. SGX Factory Reset Enables you to reset the SGX option to factory settings. This option is set to Off by default. Power Button Enables or disables the power button on the front of the system. This option is set to Enabled by default. AC Power Recovery 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. UEFI Variable Access 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. In-Band Manageability Interface 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 inband 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. SMM Security Migration Secure Boot Secure Boot Policy Secure Boot Mode Enables or disables the UEFI SMM security migration protections. 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 Custom, the BIOS uses the user-defined key and certificates. Secure Boot policy is set to Standard by default. Configures 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. Pre-operating system management applications 19