I thought something about hidden service an onion server. it's just an assumtion, i've not try !
Is it possible to locate a server ( a country, not a fixed point or public ip, but just the localisation of the continant who herbege the server, an aproximity ), by the timestamp of response of server, at the time this server to respond to a request.
By connecting to différent exit relay in the world and performing multiples request to the server, and evaluate the différence times in millisecond of the response of server, and make an average of all time pick up by relay, and this average can allow to localise the hosting country of the server ?
it's just an idea ! i think of that.
And how works the system of hidden service for the resolution of domain name into tor ?
please sorry for my crap English, i don't speak English very well.