Beyond the Wires 6
the firmware image, in addition to lifecycle management to
keep deployed devices protected as cyber threats evolve. In
addition, STM32WBA5 MCUs incorporate a secure firmware
install (SFI) mechanism that allows secure and counted
installation of OEM firmware in untrusted production
environments, such as a contract manufacturer, for anti-
cloning and IP protection. Readout protection and debug
unlock with password assist lifecycle management. The
peripherals, memories, and I/Os are securable, while the
peripheral and memory privileges are configurable to limit
access to the MCU's security-sensitive resources. There are
also protection mechanisms for embedded flash memory
and SRAM.
These wireless MCUs offer active tamper detection and
protection against physical attacks, with internal monitoring
capable of erasing secret data if an attack is detected. This
helps meet requirements for point-of-sales applications.
Secure Device Development
Of course, developers need help to marshal these features,
and here is where the STM32 ecosystem comes in. While
STM32Cube resources provide software tools and libraries
to aid development, ST has also created the STM32Trust
framework that helps navigate the security requirements and
resources available to reach the desired security assurance
level. STM32Trust security functions are conceived to
ensure IP protection, data protection, secure connectivity,
and system integrity. It guides developers to solutions such
as ST's X-CUBE-SBSFU software for implementing secure
boot and secure firmware updates, as well as the Trusted
Package Creator software to encrypt binaries for SFI.
With integrated Bluetooth
®
Low Energy 5.4 and 802.15.4
radio, STM32WBA5 wireless MCUs—and similar STM32WL
sub-1GHz MCUs for longer-range communication—simplify
and accelerate development of wireless IoT devices.
Leveraging their hardware security features and the curated
resources provided by STM32Trust, developers can
confidently implement cyber protection that meets the latest
industry standards and regulations on security and privacy.
ST@EW2023: STM32WBA - 2.4GHz
wireless microcontroller with SESIP
Level 3 security V3
