https://devzone.nordicsemi.com/f/nordic-q-a/61453/device-root-key-kdrThe docs say: Once configured, it is possible to perform cryptographic operations using the the CRYPTOCELL subsystem where KDR is selected as key input without having access to the key value itself However I can not find anyway to do this in the cryptocellen-USTelligent Community 13Mon, 18 May 2020 11:45:03 GMThttps://devzone.nordicsemi.com/thread/250422?ContentTypeID=1Mon, 18 May 2020 11:45:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bc41e1a2-8ea3-4bb7-9f46-56aec88ffe29Einar Thorsrud<p>Hi Jon,</p> <p>There is no SW support for using the device root key (KDR) directly, so it is not possible at the moment.</p> <p>Einar</p><div style="clear:both;"></div>