https://devzone.nordicsemi.com/f/nordic-q-a/82155/nrf9160-dtls-extended-master-secretHi, it seams, that MBED DTLS implementation in nRF9160 firmware v1.3.1 is not compiled with Extended Master Secret Extension https://datatracker.ietf.org/doc/html/rfc7627 While testing with https://github.com/pion/dtls/ we are getting net.Erroren-USTelligent Community 13Mon, 09 Mar 2026 16:04:50 GMThttps://devzone.nordicsemi.com/thread/562851?ContentTypeID=1Mon, 09 Mar 2026 16:04:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3094eaf1-ac7b-442d-b8b5-4b8a8674e519devarn<p>Hi,</p> <p></p> <p>Is there any update on this?</p> <p>Identical problem on the nRF9151</p> <p></p> <p>BR,</p> <p>Arnoud</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/341206?ContentTypeID=1Tue, 30 Nov 2021 09:02:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eea1f2be-9c3e-47fe-9d43-afcae88e3584Charlie<p>Hi Michal,</p> <p>Our R&amp;D team confirms that nRF9160 MFW does not support extended master secret. I have reported your&nbsp;request to the PM&nbsp;and will give you feedback if there is any update.</p> <p>Please be aware that the&nbsp;<span>extended master secret</span>&nbsp;will not be available in a short time. If you need it urgently please think about other solutions.</p> <p>Best regards,</p> <p>Charlie</p><div style="clear:both;"></div>