The X-NUCLEO-SAFEA1 expansion board is based on the STSAFE-A110 secure element. It can be used with any STM32 Nucleo development board.
The on-board STSAFE-A110 is customized with a standard profile for evaluation and is compatible with the Arduino UNO R3 connector.
The X-NUCLEO-SAFEA1 expansion board is used with free X-CUBE-SAFEA1 or X-CUBE-SBSFU software packages containing sample code to demonstrate how to implement security applications.