First off, thanks for the reply – this new forum seems much better than the old one, and much more likely to have community input!
Anyway, I’d had a hunch the prevalence of the SiK / RFD radios was most of the reason.
My concern here is specifically mitigating the risk of a remote hijack / disable, or even the more common concern of multiple aircraft on the same NetID:
We’re operating Pixhawk based aircraft commercially, and while I think a malicious attack is unlikely for now, security through obscurity… doesn’t really work for me long term.
I’ve been following the RFD series radios for a few years, but as far as I’m aware the encryption features still aren’t available on those. A quick Google didn’t turn up anything new for me just now, but if the encryption is working on the RFD series I’d go that route in a heartbeat.
Short of either the RFD or Xtend radios, the only other idea I’ve had regarding securing the connection would be to run a companion computer with an SSH tunnel + MAVproxy over the SiK radios to communicate with the ground station…