Recently, the Shmoo Group discovered that Firefox is vulnerable to precisely the exploit that i predicted in my 2002 paper—Ping

I suspect that it is workable but with increased effort; maintaining a global namespace is increasingly difficult the larger it becomes. Incidentally, there is no reason this "certificate as token of legal jurisdiction" system cannot be implemented in conjunction with the petname system. Personally, I would feel even more comfortable with an introduction to Paypal from a friend *and* a visible identifier indicating that this Paypal is also a registered legal entity in Canada (signed by the government, or governement approved CA, for instance). I would initially award a greater degree of trust to such a "Paypal" because of the legal recourse I would have at my disposal.—Sandro