Ok I had a look at Safe.Zone. How does that system make sense? First of all, it is a non-blockchain based system right? It is just a network of websites agreeing upon a certain level of security standards. The fact that you provide PerNums is a pseudo blockchain approach assuming I understand it correctly. Why not build an entire Internet on the blockchain where instead of your PerNum you have your Public Key? What's the advantage of Safe.Zone?