If you split a secret over two people, first, we use the 5$ wrench on one of you to identify the other and the rest is easy. If the second person is somewhere

If you split a secret over two people, first, we use the 5$ wrench on one of you to identify the other and the rest is easy. If the second person is somewhere else in a different jurisdiction, how are you going to communicate with each other to get the two halves of the secret together to encrypt/decrypt messages? It's an unworkable situation. As I see it, you create a fantasy situation that would not work if you just want to communicate with people in a secure way. No amount of technology or encryption is going to work, especially in the real practical world.