https://devzone.nordicsemi.com/f/nordic-q-a/50918/app-signature-validation-failingHello. I have integrated signature validation before boot in my boot loader. This uses the `nrf_dfu_validation_boot_validate` function, which eventually calls into `nrf_crypto_backend_secp256r1_verify. ` The verify function is returning a signature verificationen-USTelligent Community 13Thu, 15 Aug 2019 08:03:09 GMThttps://devzone.nordicsemi.com/thread/204226?ContentTypeID=1Thu, 15 Aug 2019 08:03:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:451719a5-2420-4a83-af45-2500cff9d42dMarjeris Romero<p>Hi suhaibish,</p> <p>How many chips have you tested? Is the chip used in your own hardware or in a DK? Can you give us information about the build code of the chip (chip markings on the top)?</p> <p>Could you also read the app flash on both devices, a failing one and a working one and check if the app area is identical on the two?</p> <p><pre class="ui-code" data-mode="text">nrfjprog --readcode &lt;file path&gt;</pre></p> <p>Best regards,</p> <p>Marjeris</p><div style="clear:both;"></div>