ST STM32CubeU5 TFM User Manual page 3

Acronym
Nonsecure processing environment (PSA term). In TF‑M, this means nonsecure domain typically running an
NSPE
operating system using services provided by TF‑M.
MPU Memory protection unit.
OAEP Optimal asymmetric encryption padding is a padding scheme often used together with RSA encryption.
PS Protected storage service. Protected storage service provided by TF‑M.
PSA Platform Security Architecture. Framework for securing devices.
RDP Readout protection.
RNG Random number generator.
RoT Root of trust.
RSA Asymmetric cryptographic system from Rivest–Shamir–Adleman
Secure Boot and Secure Firmware Update. In the STM32CubeU5, this is the name of the TF‑M based application,
SBSFU
with Secure Boot and Secure Firmware Update functionalities only.
SE Secure element (STSAFE in the context of this document).
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 protected by TF‑M.
Secure partition manager. The TF‑M component responsible for enumeration, management, and isolation of
SPM
multiple secure partitions within the TEE.
Secure service. A component within the TEE that is atomic from a security/trust point of view, which is viewed as a
SS
single entity from a TF‑M point of view.
TBSA-M
Trusted base system architecture for Arm
TEE Trusted execution environment.
TFM In the STM32CubeU5, this is the name of the TF‑M-based application with complete functionalities.
Trusted firmware for M-class Arm. TF‑M provides a reference implementation of secure world software for
TF‑M
Armv8‑M.
TRNG True random number generator.
WRP Write protection.
UM2851 - Rev 4
Description
® ®
Cortex -M.
UM2851
Acronyms
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