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