Hi! > You raise important questions: how many tor relays currently listed > in the directory are running on hardware owned by the same entity? And > how many of those are on hardware physically located at the same site?
And if they are using virtual servers within the same ISP... > Is it possible to get a three-hop circuit using relays that are ostensibly > being operated by different individuals, but which are all running on the > same physical machine because the operators all subscribe to the same > company's hosting service? Whois and geoip could help you at least in some way with approximating how many such circuits (which do not use nodes listed as a family of nodes) could exist. It would be a rough estimate though. Maybe we could make a script which would go over whois data and e-mail operators so that they could cooperate end enter those nodes as a family. Or maybe this could be an automated process? (To check when building a circuit if nodes are of the same ISP.) Mitar