The threat model for most FPV pilots (either hobbyists or people in Ukraine) doesn't really include hijacking of the air link. It's trivial to just shoot something down with interference, sometimes inadvertently.
Pretty much everyone in FPV is now using ExpressLRS, which is an open protocol. If you want an encrypted air link, then the best option I'm aware of is the proprietary TBS Crossfire protocol.
Pretty much everyone in FPV is now using ExpressLRS, which is an open protocol. If you want an encrypted air link, then the best option I'm aware of is the proprietary TBS Crossfire protocol.
https://www.expresslrs.org/
https://www.team-blacksheep.com/