Crossfire supports encryption. Mainline ELRS can't add encryption support because the whole idea of ELRS was to reduce LoRa packet size to the bare minimum nee

Crossfire supports encryption. Mainline ELRS can't add encryption support because the whole idea of ELRS was to reduce LoRa packet size to the bare minimum needed for 4 full res channels + a bit extra for arming and time multiplexed aux channels. There's some discussion on protocol security and scope here [0]. I'm sure these days there are multiple LoRa based links (independent and ELRS forks) that support authenticated encryption. [0] https://github.com/ExpressLRS/ExpressLRS/pull/1411 https://github.com/ExpressLRS/ExpressLRS/pull/1411