The following table presents the definition of acronyms that are relevant for a better understanding of this
document.
Table 1. List of acronyms
Acronym Description
AEAD Authenticated encryption with associated data
CLI Command‑line interface
EAT Entity attestation token
GUI Graphic user interface
HDP Secure hide protection
HUK Hardware unique key
HW Hardware
IAT Initial attestation
IPC Interprocess communication
ITS Internal storage service. Internal storage service provided by TF-M.
NSPE
Non‑secure processing environment PSA term. In TF-M this means a non‑secure domain typically running an
operating system using services provided by TF-M.
MPU Memory protection unit
PSA Platform security architecture. Framework for securing devices.
RDP Readout protection
RoT Root of Trust
SBSFU
Secure boot and secure firmware update. In the STM32CubeL5 this is the name of the TF-M based application,
with secure boot and secure firmware update functionalities only.
SESIP Security evaluation standard for IoT platforms
SFN Secure function. An entry function to a secure service. Multiple SFN per SS are permitted.
SP Secure partition. A logical container for a single‑secure service.
SPE Secure processing environment PSA term. In TF-M this means the secure domain is protected by TF-M.
SPM
Secure partition manager. The TF-M component is responsible for the enumeration, management, and isolation of
multiple secure partitions within the TEE.
SS
Secure service. A component within the TEE that is atomic from a security or trust point of view, meaning which is
viewed as a single entity from a TF-M point of view.
SST Secure storage service. Secure storage service provided by TF-M.
SW Software
TBSA-M
Trusted base system architecture for Arm
®
Cortex
®
-M
TFM In the STM32CubeU5 this is the name of the TF‑M‑based application with complete functionalities.
TF-M
Trusted firmware for M-class Arm. TF‑M provides a reference implementation of secure world software for
Armv8‑M.
TOE Target of evaluation
WRP Write protection
UM2852
General information
UM2852 - Rev 1
page 3/27
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