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

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#13837: Mitigate guard discovery by pinning middle node
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 Reporter:  asn                                  |          Owner:
                                                 |  mikeperry
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-hs, tor-guard, guard-discovery-  |  Actual Points:
  prop247-controller                             |
Parent ID:  #9001                                |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorV-can
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Changes (by mikeperry):

 * status:  assigned => needs_review


Comment:

 I have a branch for this in
 https://oniongit.eu/mikeperry/tor/commits/bug13837. It has two commits:
 one that just does the dead-simple layer2 and layer3 guard thing, and then
 a second that adds purposes for hsdirs, so that those use pinned guards
 too.

 This disables cannibalization and predictive circuit building for vanguard
 circuits. That is bug #23101.

 I'm not sure the best way to test this. I've been testing it with
 https://github.com/mikeperry-tor/vanguards. Do we have other suggestions?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13837#comment:21>
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