si può partire da Tor senza che si sappia che lo usi usando i Bridge che cambiano spesso credo
http://tor.cybermirror.org/bridges.html.en
https://bridges.torproject.org/ 
Finding more bridges for Tor
Another way to find public bridge addresses is to send mail to bridges@torproject.org with the line "get bridges" by itself in the body of the mail. You'll need to send this request from a gmail account, though otherwise we make it too easy for an attacker to make a lot of email addresses and learn about all the bridges. Almost instantly, you'll receive a reply that includes:
Here are your bridge relays:
bridge 60.16.182.53:9001 c9111bd74a710c0d25dda6b35e181f1aa7911133
bridge 87.237.118.139:444 c18dde4804e8fcb48464341ca1375eb130453a39
bridge 60.63.97.221:443 ab5c849ed5896d53052e43966ee9aba2ff92fb82
Once you've received the email with bridge information, you can continue the Vidalia configuration steps outlined above.
http://tor.cybermirror.org/bridges.html.en#Finding...