https://devzone.nordicsemi.com/f/nordic-q-a/16958/nrf52---secure-bootloader-crc-failedHello, I have some trouble to use the Secure Bootloader example, which comes with the nRF5_SDK_12.1.0 I installed the latest nrfutil and hexmerge. I can compile the bootloader (use Debug mode). Then I merged the hex file with the S132 Softdeviceen-USTelligent Community 13Mon, 10 Oct 2016 12:29:08 GMThttps://devzone.nordicsemi.com/thread/65033?ContentTypeID=1Mon, 10 Oct 2016 12:29:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b9ad85d3-0904-4f6c-8e18-61e77e941654FormerMember<p>When you create a .zip for uploading via DFU, I see that you use the private key in the file privatekey.pem. Did you remember to add the corresponding public key to the bootloader (dfu_public_key.c)?</p><div style="clear:both;"></div>