>Just high enough for lots of people and their friends to conspire against the rest of the network? That depends upon what they conspire to do, surely? As far

>Just high enough for lots of people and their friends to conspire against the rest of the network? That depends upon what they conspire to do, surely? As far as I can see there are three attacks: * Creation of fictional people * Conspiracy to "unperson" a real person * Identity theft There are many defenses that could be put in place against all of these using a web of trust system. The PGP version is a little rudimentary to protect against them, but it's still a good foundation.