New secure element provides turnkey security solution for devices connected to the cloud

August 7, 2025

Issue 2 2025, Issue 6 2024, Issue 6 2025

The STSAFE-A120 from STMicroelectronics provides CC EAL5+-grade security for connected home and industrial products. Authentication functions and a unique identity enable devices to link securely to popular cloud computing services.

The new STSAFE-A120 secure element from STMicroelectronics offers the security functions required to authenticate a connected device and securely attach it to a remote server or to cloud computing services such as AWS or Microsoft Azure. 

 

Running on a CC EAL5+ certified platform, the STSAFE-A120 comes with a rich feature set which ensures strong device authentication based on X509 certificates which are compatible with the Qi 2.0 wireless charging and Matter wireless networking specifications.

 

The chip capabilities include monitoring device usage, assisting in secure connection establishment via TLS, and safeguarding the integrity of the host platform. The STSAFE-A120 connects to a host microcontroller via an I2C interface.

 

Integration into secure system designs is eased by the availability of libraries which are compatible with STM32 and other general-purpose MCUs, and the STM32 Nucleo family of expansion boards. Designers using the STM32Cube software development ecosystem can also easily build the STSAFE-A120 into the development flow.

 

ST supplies STSAFE-A120 interfaces, drivers and source code examples for the Arduino family of system boards. 

Features

  • Symmetric encryption and decryption
  • Secure data storage and counters
  • Signature verification service
  • Remote cloud authentication
  • Enrolment of devices into cloud computing services:
    • Amazon AWS JIT
    • Microsoft Azure DPS

Applications

  • Consumables
  • Accessories
  • IoT devices
  • Smart home products
  • Smart city products
  • Industrial equipment
  • Consumer electronics devices

Evaluation Board

Part Number: X-NUCLEO-SAFEA1

The X-NUCLEO-ESE01A1 expansion board is based on the STSAFE-A120 secure element from STMicroelectronics. It can be used with any STM32 Nucleo microcontroller development board.

 

The on-board STSAFE-A120 is customized with a standard profile for evaluation. It is compatible with the Arduino UNO R3 connector.

 

The X-NUCLEO-ESE01A1 expansion board is supported by free X-CUBE-STSE01 software packages containing sample code to demonstrate how to implement security applications. Free drivers, middleware and software samples are compatible with the STM32 open development environment.

X-NUCLEO-ESE01A1

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