https://devzone.nordicsemi.com/f/nordic-q-a/14462/how-to-check-dfu-sourceHi, I just started working on nRF52 with Bluetooth, and I have some concerns about DFU and security. I’m working on a product equipped with an nRF52 and a MEMS microphone. It will be controlled by a smartphone app (Bluetooth), and the application needsen-USTelligent Community 13Tue, 14 Jun 2016 14:34:21 GMThttps://devzone.nordicsemi.com/thread/55233?ContentTypeID=1Tue, 14 Jun 2016 14:34:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:225d9772-a85a-4a7c-9722-e011011efdd1Vidar Berg<p>Hi, for the 51 we currently have an experimental example for DFU with asymmetric signing of the FW image using ECC. This means that only images signed with your private key will be accepted and by that verify that the image is from a trusted source. This is explained in a bit more detail in the documentation included with the example.</p> <p>This example has not been offically ported to 52, but this one is a port made by a colleague if you want to try it out: <a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/8081.nRF5_5F00_SDK_5F00_v11_5F00_0_5F00_0_5F00_nrf52_5F00_dfu_5F00_signing_5F00_290316.zip">nRF5_SDK_v11_0_0_nrf52_dfu_signing_290316.zip</a></p><div style="clear:both;"></div>