https://devzone.nordicsemi.com/f/nordic-q-a/57517/functions-and-power-consumption-of-the-cryptographic-module-on-nrf52840Hello I am quite new to the hardware encryption topic and I have the following questions. On a device where the MCU samples a sensor data and stores it to a external IC at a fixed frequency If we want the data stored on the IC to be encrypted. Isen-USTelligent Community 13Fri, 07 Feb 2020 17:50:43 GMThttps://devzone.nordicsemi.com/thread/233368?ContentTypeID=1Fri, 07 Feb 2020 17:50:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3fd2210d-9778-4f12-bd1e-6c659c307155William Geng<p>Many thanks! This is very helpful!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/233274?ContentTypeID=1Fri, 07 Feb 2020 12:44:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ec7cb857-4dcb-4710-82fb-8402e92d0035Vidar Berg<p>Hi William,</p> <p>I don&#39;t imagine it&#39;s going to make much difference to the average current consumption if you encrypt the data on the fly or if you to it at the end. Maybe you will get a little less CPU overhead if you do it all at once. Crypto operations aren&#39;t that costly, especially when there&#39;s HW support available such as the cc310.&nbsp;&nbsp;</p> <p>I think this blog post is a good start if you want to manage encryption and key exchange in your app:&nbsp;</p> <p><a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/intro-to-application-level-security-using-the-ecb-">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/intro-to-application-level-security-using-the-ecb-</a></p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>