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UM2262 Rev 6 9/94
UM2262 General information
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1 General information
The X-CUBE-SBSFU Expansion Package comes with examples running on the STM32L4
Series, STM32F4 Series, STM32F7 Series, STM32G0 Series, STM32G4 Series, STM32H7
Series, STM32L0 Series, STM32L1 Series, and STM32WB Series. An example combining
STM32 microcontroller and STSAFE-A100 is also provided for the STM32L4 Series.
X-CUBE-SBSFU is provided as reference code for standalone STM32 system solution
examples demonstrating best use of STM32 protections to protect assets against
unauthorized external and internal access. X-CUBE-SBSFU proposes also a system
solution example combining STM32 and STSAFE-A100, which demonstrates HW Secure
Element protections for secure authentication services and secure data storage.
X-CUBE-SBSFU is a starting point for OEMs to develop their own SBSFU as a function of
their product security requirement levels.
The X-CUBE-SBSFU Secure Boot and Secure Firmware Update Expansion Package runs
on STM32 32-bit microcontrollers based on the Arm
®(a)
Cortex
®
-M processor.
1.1 Terms and definitions
Table 1 presents the definition of acronyms that are relevant for a better understanding of
this document.
a. Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
Table 1. List of acronyms
Acronym Description
AAD Additional authenticated data
AES Advanced encryption standard
CBC AES cipher block chaining
CKS Customer key storage
CTR AES counter-based cipher mode
DMA Direct memory access
DSA Digital signature algorithm
ECC Elliptic curve cryptography
ECCN Export control classification number
ECDSA Elliptic curve digital signature algorithm
FSM Finite-state machine
GCM AES Galois/counter mode
GUI Graphical user interface
HAL Hardware abstraction layer