Linux.com - https://www.linux.com/news/introduction-security-and-tls
IoT (Internet of Things) is all about connecting to the internet and even more about security. Without security and encrypted communication, everyone can possibly see what I send or receive. And this is especially bad if passwords or user names are sent in an unencrypted way. So, encryption and secure communication is key. The solution to that is to use a connection which uses the TLS (Transport Layer Security) protocol, which I want to use for my MQTT communication (see MQTT with lwip and NXP FRDM-K64F Board).