0

On https://2019.www.torproject.org/docs/onion-services it says that whenever the client or server contacts the rendezvous point or one introduction point, it always builds a full tor circuit.

So, why does it say (near the ending) that

In general, the complete connection between client and onion service consists of 6 relays: 3 of them were picked by the client with the third being the rendezvous point and the other 3 were picked by the onion service.

It implies a circuit of 2 relays from the client to the RP. Maybe the client builds a full circuit to the RP only at the beginning (to share the one-time-secret) and then later uses it as third node?

New contributor
Christian is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct.
  • I don't understand the question here. The RP is chosen by the client and is part of the client's circuit (it's the third hop). Why does this imply a circuit of 2 relays? A "full tor circuit" in this case is a circuit with three hops, where each hop was chosen by the party building the circuit. – Steve Nov 21 at 18:54
  • @Steve If RP is the third hop, then there aren't 3 nodes between the client and the RP. It would be (client)--> (1st relay) --> (2nd relay) --> (RP). That's not a full circuit. – Christian Nov 21 at 18:57
  • There aren't supposed to be 3 nodes between the client and the RP. The RP is part of the circuit. So the client builds a 3 hop circuit (1st relay) -> (2nd relay) -> (RP), and the onion service builds a 4 hop circuit (1st relay) -> (2nd relay) -> (3rd relay) -> (RP). Note that the page you linked to is old and no longer maintained. – Steve Nov 21 at 19:00
  • Mmh... but on that site it says: "Around this time, the client also creates a circuit to another randomly picked relay and asks it to act as rendezvous point by telling it a one-time secret." All the green arrows in the pictures are supposed to be circuits, full circuits. I thought it was updated to 2019. – Christian Nov 21 at 19:06
  • It's probably just the original author trying to simplify things. Tor doesn't really have a concept of "full circuits". A circuit is considered anonymous if it has three relays chosen independently by the client (or whoever is building the circuit). – Steve Nov 21 at 19:13

Your Answer

Christian is a new contributor. Be nice, and check out our Code of Conduct.

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.