https://devzone.nordicsemi.com/f/nordic-q-a/38728/how-to-disable-bootloader-dfu-signatureHi I want to update bootloader.zip file over BLE DFU mode without signature checking , the open bootloader example only for USB, How to disable bootloader signature checking at secure bootloader example code ? Thanks.en-USTelligent Community 13Thu, 20 Sep 2018 12:51:05 GMThttps://devzone.nordicsemi.com/thread/149639?ContentTypeID=1Thu, 20 Sep 2018 12:51:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d40154bf-2502-4afe-af7d-07ab7d883c5dVidar Berg<p>Hi,</p> <p>It is possible to remove the signature requirement from the secure bootloader examples, but then you should not use the same Service UUID as it is reserved&nbsp;for&nbsp;the secure&nbsp;implementation (I.e., DFU with signature requirement). You may use the nrf_dfu_req_handler.c file from the open bootloader as reference to see how you can disable the signature check (req handling should not be transport depentent). Note that the open bootloader still require signature validation for bootloader updates.&nbsp;&nbsp;</p> <p>&nbsp;</p><div style="clear:both;"></div>