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Last updated February 20th, 2024

Term Definition
BIOS A collection of firmware components that includes the below the OS environment and the BIOS setup utility. The BIOS setup utility is used to configure hardware and BIOS features.
BIOS Auto-Recovery A Samsung Galaxy Book4 Secured by Knox feature through which the Secure Embedded Processor will automatically recover a working BIOS if the original has been corrupted.
Secure Boot Configuration Recovery A Samsung Galaxy Book4 Secured by Knox feature through which UEFI variables related to BIOS Secure Boot are protected and recovered if corrupted.
Intel Boot Guard A feature available on Intel processors to validate the initial boot block of the BIOS by signature and version number. The initial boot block verifies and loads subsequent BIOS components.
One Time Programmable (OTP) Fuse Bank A collection of hardware fuses that can only be set once. This is used to store the firmware rollback protection value and firmware certificate hash.
SPI Flash Storage device A flash storage device used for storing the BIOS firmware and any data required by the BIOS.
Secure Embedded Processor (SecEP) A Samsung Galaxy Book4 Secured by Knox processing unit running alongside the main CPU. The Secure Embedded Processor provides security features for the BIOS.
System Management Mode A privileged CPU mode used for power management, UEFI variable management, and firmware management.
Tamper Alert A Samsung Galaxy Book4 Secured by Knox feature through which booting an OS requires user or admin confirmation if any boot policy violation has been detected.
Trusted Platform Module (TPM) A dedicated microcontroller designed for cryptographic operations.
UEFI Standard Either the UEFI Specification that defines the software interface between an OS and firmware or the reference implementation for the UEFI Specification.
UEFI variables Persistent data stored on SPI Flash Storage. The format and interface for UEFI variables are included as part of the UEFI Specification. This data is used by the BIOS and by UEFI components running in the OS.

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