I never really had an interest in log book of the world till now. So I just signed up, and awaiting their postcard or whatever. Using those certificates sure seems like a logical way to keep the network secure. I have been wondering if anyone running a IPIP gateway applies any security by locking it down with iptables to only the other known gateways. Perhaps this could be worked into rip44d as an option? This is essentially what D-Star the dssecd D-STAR Gateway security enhancement application/daemon does. At that point the only issue is who is allowed to create a gateway in the portal. And perhaps that is where this ham verification technique could be applied.