That will be harder in the near future. There are already youtubers showing the dozens of methods devices are using to talk to one another out of band and with

That will be harder in the near future. There are already youtubers showing the dozens of methods devices are using to talk to one another out of band and without user interaction. This guy covers some of the methods in a few of his videos [1]. [1] - https://www.youtube.com/c/BraxMe/videos https://www.youtube.com/c/BraxMe/videos [video list]