Not that I know of, I only managed to get this far in my analysis. I have a protocol that might work, but theres a huge gaping hole in the protocol.

I thought about your position again, and there is a large amount of merit to creating human to human connections, which is a significant component of your push.

As long as you don't want to "scale", or are trying to build it over the net, and do it in person, it avoids the issues of proof of life.