IoT, Iot Security, Cybersecurity, Mqtt, Cryptography.
ChaCha20, Poly1305, etc) at the application level — e.g. as a “light wrapper” around MQTT. The way that CurveZMQ secures ZeroMQ using CurveCP. Though for a different protocol (MQTT), and ideally using something more mainstream and actively maintained, like libsodium. But I’m not a crypto expert —