"OK, that makes sense. So whatever way they are connecting to the BeagleBone device (wifi, usb, network) can use an SSH tunnel."

"Can someone explain to me what ssh is being used for in this case?  Is it encryption between DroidPlanner and the aircraft via wifi, or telemetry frequency?  Does this encrypt the Tx/Rx (I don't think so)? I'm new here so, please excuse me if seems…"