In short: you can't (because nobody can). The easiest way is connecting over that network, using your VPN; you probably have a way of verifying that. (Of course

In short: you can't (because nobody can). The easiest way is connecting over that network, using your VPN; you probably have a way of verifying that. (Of course, you need to have previously set up the VPN over a different, trusted network. Turtles all the way down, but some turtles are more manageable than others) Analogy: "prove that nobody has looked at this piece of paper." For all the checks antd assurances, all you'll ever get is a probability, not a proof.