####################### Terms and abbreviations ####################### This document uses the following terms and abbreviations. .. glossary:: UEFI Unified Extensible Firmware Interface. EBBR Embedded Base Boot Requirements FSBL First stage boot loader TPM Trusted Platform Module PK Platform Key KEK Key Exhange Key db Signature Database dbx Forbidden Signature Database ESP EFI System Partition RPMB Replay Protected Memory Block TCG Trusted Computing Group