https://devzone.nordicsemi.com/f/nordic-q-a/76261/mutual-tls-mtlsI would like to do mutal TLS on a NRF9160. I found the https sample where the firmware does server authentication. How do I add client side authentication to this example so that I get mTLS? Did I miss a sample that already shows this? Best regardsen-USTelligent Community 13Fri, 11 Jun 2021 14:30:39 GMThttps://devzone.nordicsemi.com/thread/314947?ContentTypeID=1Fri, 11 Jun 2021 14:30:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f486155b-c13e-46eb-9281-f2821edc4504H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>Mutual TLS, as described on AWS atleast (<a href="https://aws.amazon.com/blogs/compute/introducing-mutual-tls-authentication-for-amazon-api-gateway/">https://aws.amazon.com/blogs/compute/introducing-mutual-tls-authentication-for-amazon-api-gateway/</a>), looks to be a verification of the client, similar to what the client does when verifying the domain.</p> [quote user=""]Did I miss a sample that already shows this?[/quote] <p>No, there&#39;s no sample for this specifically on HTTPS. If you look at the mqtt cloud samples, you will see client and server verification.</p> <p>You input the ca root and client keypair to the modem via modem_key_mgmt_write():</p> <p><a href="https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/subsys/net/lib/nrf_cloud/src/nrf_cloud_transport.c#L419-L449">https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/subsys/net/lib/nrf_cloud/src/nrf_cloud_transport.c#L419-L449</a></p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>