[tor-talk] Identify requests made by the same user

[NoWhereMan]

Il 21.06.2013 09:37 grarpamp ha scritto:

> 
> At the level of the resultant TCP tunnel (at the application layer, 
> through
> an exit or to an onion) all real IP's are effectively anonymized. Tor 
> uses
> a mix of PKI, DH, EC, etc in extending its paths and so on. Your
> question involves that, ie: does your client negotiate using some
> identifiables from that with each endpoint... Take a look at 
> tor-spec.txt
> and path-spec.txt.

Hmmm, ok. What I actually can't understand is: when contacting an hidden 
service, the message for it gets encrypted using its public key. And 
some other security layers, ok, but the message uses the HS public key.

The response, should work the same way, no? I mean: the hidden service 
encrypts the response using the client's key, so it knows that. The HS 
actually know the client's key: it can't correlate the key with a 
location, an ip address or a name, but this can be exploited so that 2 
different hidden service's administrators could actually know that 
request X on hidden service A and request Y on hidden service B has been 
made from the same client (as the responses have been encrypted with the 
same public key).

Can't understand where i'm wrong. As I hope to be wrong.

Thankyou

-- 
NoWhereMan
nowhereman at autistici.org