https://devzone.nordicsemi.com/f/nordic-q-a/84171/nrf9160-security-related-clarifyIn modem firmware update sample for nRF9160 gives info about to use non-secure(ns) board. In non-secure(ns) board, it create two environments inside the CPU that can run isolated from each other: a secure and a non-secure environment. Have gone throughen-USTelligent Community 13Fri, 28 Jan 2022 10:22:48 GMThttps://devzone.nordicsemi.com/thread/350160?ContentTypeID=1Fri, 28 Jan 2022 10:22:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b79a3f51-fcf4-4507-acd9-58c75f272d25Sigurd Hellesvik<p>Hi</p> <p>To learn more about secure and non-secure and other features of the Arm TrustZone, I recommend&nbsp;looking at these <a href="https://developer.arm.com/ip-products/security-ip/trustzone/trustzone-for-cortex-m">webinars and learning materials</a>.</p> <p>Regards,<br />Sigurd Hellesvik</p><div style="clear:both;"></div>