Does the Bootloader Cryptography Module provide protection against Reverse Engineering Firmware?

[koniho]

I recently saw that SDK12.0 provides a Bootloader Cryptography module. I'm not certain after reading the documentation that this module can support my use case:

infocenter.nordicsemi.com/index.jsp

I have a requirement to prevent reverse engineering of distributed firmware files. Does the Bootloader Cryptography module provide a method of encrypting a firmware file at compile time (with a 'secret' key) that can be decrypted on the nRF side at DFU time? This is assuming that the DFU on the nRF has knowledge of the 'secret' key - i.e. a 'shared secret'.

The 'shared secret' would be programmed into the nRF at manufacturing time.

Is the above use-case covered by the Bootloader Cryptography module?

[RK]

This was basically asked the other day in this thread and the answer was no, but there were a few suggestions in there.

[Dave_couling]

Correct, but since there are other encryption functions in the chips, its not difficult to write your own encryption/decryption layers at the file level.