https://devzone.nordicsemi.com/f/nordic-q-a/85595/utilize-crypto-hardware-backend-feature-on-nrf52840-dongleHi, In nrf52840 dongle, I use nrf_crypto_ecdsa_sign function to sign. Everything is fine in when building, but when testing the real world data, it’ll will show error “FAILED” of sign function in “if” block that I’d written by my own. Is thisen-USTelligent Community 13Wed, 09 Mar 2022 13:44:16 GMThttps://devzone.nordicsemi.com/thread/357187?ContentTypeID=1Wed, 09 Mar 2022 13:44:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:76f54493-7e80-4f9a-8657-25c8f8d9c777Einar Thorsrud<p>Hi</p> <p>I see you have some warnings, but I do not see enough of you code to say exactly what the problem is or if it is related. You should always ensure that your code is warning free though, as this is often pointing to things than are problematic. So before debugging more you should start by resolving the warnings as they could very well be responsible for the issue.&nbsp;Where does your sign_context come from?</p> <p>If you want me to make specific suggestions, please share relevant parts of your code and copy-past all warnings from the build output, and check exactly which error code you get returned from&nbsp;nrf_crypto_ecdsa_sign().</p><div style="clear:both;"></div>