Is it possible to log illegal access by the debugger in the state of RDP Level 1?

[Kenji1]

Hi, team.

Question about security of the MCU.

Is it possible to log illegal access by the debugger in the state of RDP Level 1? Any bits is a available for it?

[Bubbles]

Hi @Kenji​,

no in general there is no such trace.

Since the debugger can be connected even when the MCU is under reset, it would have to be built inside the debug interface itself and there in no such provision.

If you are concerned with security, I recommend considering RDP2.

BR,

J

[Kenji1]

Hi @JHOUD​ 

Thank you for your response.

[WojtekP1]

I would not trust RDP at all until ST will clearly state that this problem is fixed in newer MCUs like STM32G

after reading this:

https://www.aisec.fraunhofer.de/en/FirmwareProtection.html

even amateur with little money can crack it

[Kenji1]

Hi @Community member​ 

​

Thank you for your valuable information.

I didn't know about this.

​

Since there is no other way at the moment, I will use RDP for now.

It's better to have it than not.

I expect ST engineers to improve it.