Mission planner packet signing

ArduCopter
1

Hi,
I have trying the malvink 2.0 signing feature. I followed the steps as below:

  1. selected mavlink 2 on serial port 1.
  2. opened signing window on mission planner and entered friend key and parse key and finally after key is generated, clicked on use and save button.
    But i am clear about how to test it. My doubts are:
  3. Once i activated the key, will my pixhawk connect only to authorised mission planner(the one that has the key) over usb and rf channel.