https://devzone.nordicsemi.com/f/nordic-q-a/15419/single-bank-ble-dfu-signing-on-nrf51822acHi, I would like to add single bank signed DFU support to my project (running on nrf51822AC - 256kb version). In SDK 10, there was an experimental bootloader with a nice document explaining how to modify the keys in the code and recompile such thaten-USTelligent Community 13Mon, 08 Aug 2016 13:50:01 GMThttps://devzone.nordicsemi.com/thread/58847?ContentTypeID=1Mon, 08 Aug 2016 13:50:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:81f049d2-bf10-49fe-a2ea-9e41140f94f5bjorn-spockeli<p>Hi Shay,</p> <p>the experimental bootloader that supported DFU with signing in SDK v10.0.0 was removed in SDK v11.0.0. Allthough the dfu_init_template_signing.c and nrf.h sec header is still in the components folder (these files should have been removed ) , you still need the ECC module(nrf_sec) in order to validate the signed image.</p> <p>We&#39;re introducing a new bootloader in the next SDK release ( scheduled in late August/early September, note subject to change) which supports DFU with signed images. I recommend waiting for this release.</p> <p>-Bjørn</p><div style="clear:both;"></div>