Most Secure STM32 ?

[bsuthar]

Hello Team,

Good Day !

After Cloneed our two version of Hardware ( STM32F3 Series based ) by compititor , we are now more focused on Hardware Security aspects.

Can you Pls Suggest which STM32 MCU is the MOST Secure among all available MCU ? Considering Firmware Protection / physical  Attacks ? 

I would appriciate , if Higher Level Architecture with Device name is Provided.

We are also open for Paid Consultancy if any 3rd party ready to help...

Regards ,

Bhupendra

[Bubbles]

Hello @bsuthar,

The H5 has UBE, which is more universal then just a simple Boot lock. So even better.

In RDP2, the user flash is protected against readout by debug interface and in most devices, it also prevents using boot modifiers to enter the ST bootloader. This is important, because the bootloader could otherwise be used to perform user code readout.

But the user code is still unrestricted. It can erase and program flash pages to perform firmware update. Besides the SBSFU (recommended) there's also the old, simple IAP (in application programming example):

X-CUBE-IAP-USART | Product - STMicroelectronics

You just need to replace the communication interface.

BR,

J