[tor-bugs] #13837 [Tor]: Mitigate guard discovery by pinning middle node

[Tor Bug Tracker & Wiki]

#13837: Mitigate guard discovery by pinning middle node
------------------------------+---------------------
 Reporter:  asn               |          Owner:
     Type:  defect            |         Status:  new
 Priority:  normal            |      Milestone:
Component:  Tor               |        Version:
 Keywords:  tor-hs tor-guard  |  Actual Points:
Parent ID:                    |         Points:
------------------------------+---------------------
 Hello,

 inspired by the recent discussions on guard discovery, I went ahead
 and implemented a small patch for Tor that tries to help defend
 against Hidden Service guard discovery attacks.

 It basically allows the operator to specify a set of nodes that will
 be pinned as middle nodes in Hidden Service rendezvous circuits. The
 option only affects HS rendezvous circuits and nothing else.

 Of course, it doesn't fix guard discovery, it just pushes guard
 discovery to the next hop, so that they need to compromise two boxes
 to win.

 You can find my branch in 'sticky_mids' at
 https://git.torproject.org/user/asn/tor.git .

 (Here it is in HTTP shape:
 https://gitweb.torproject.org/user/asn/tor.git/shortlog/refs/heads/sticky_mids
 )


 [This is the trac version of https://lists.torproject.org/pipermail/tor-
 dev/2014-November/007730.html]

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13837>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online