About firmware protection

[OldXiao]

I have read info somewhere which said there is method to crack the protection just by setting UICR APPPROTECT register.

I want to know if Nordic has upgraded the protection solution, or developer can use some method in his firmware?

My goal is to prevent firmware from being copied.

Thank you.

[SwRa]

Hello,

For newer revisions (rev 3 and above), APPROTECT is enabled by default in the hardware, and unlocking the device for debugging requires an ERASEALL, which also erases the code. You could go through this blog:  Working with the nRF52 Series' improved APPROTECT  There is also this ticket that you can take a look at: Approtect mechanisms on nrf52840 

Best Regards,

Swathy 

[OldXiao]

Thank you so much.

So,NRF52840 has been fixed,I can rely on NRF52 SDK S140, is that right?

Which example can I study?

Thank you.

[SwRa]

Hello,

OldXiao said:

,I can rely on NRF52 SDK S140, is that right?

Yes, you can use the nRF5 SDK with S140. You can also use the nRF Connect SDK. Both SDKs support the improved protection features, provided your hardware is a newer revision.

As for the example, do you mean an example to study the APPROTECT feature.? In that case, there is no specific "example project" solely for APPROTECT, but the Nordic blog post on improved APPROTECT provides code snippets and step-by-step instructions for both nRF5 SDK and nRF Connect SDK.

Regards,

Swathy