Re: [tor-bugs] #17857 [Tor]: Create a consensus param to disable (netflow) padding if RSOS is enabled (was: Disable (netflow) padding if RSOS is enabled)

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#17857: Create a consensus param to disable (netflow) padding if RSOS is enabled
-------------------------+------------------------------------
 Reporter:  teor         |          Owner:
     Type:  enhancement  |         Status:  new
 Priority:  Medium       |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor          |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:               |  Actual Points:
Parent ID:  #17178       |         Points:
  Sponsor:               |
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Description changed by mikeperry:

Old description:



New description:

 Because RSOS and Proposal 252 both appear to cause an onion service to
 make a lot of orconns to many relays, the total overhead of the netflow
 padding defense will be much larger for these services.

 In an ideal world, we'd find some way to minimize the number of orconns
 that these services make, because the increased level of connection
 multiplexing would be better against traffic analysis attacks, and thus
 also mean less overhead for padding defenses (including netflow padding,
 but beyond that as well).

 In the meantime, however, we should provide the ability to disable netflow
 padding via the consensus for these services. With a consensus param, we
 can monitor the netflow padding overhead in relay extra-info descriptors,
 and experiment with turning padding for RSOS/SOS on and off while
 observing the change in total overhead at relays.

--

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17857#comment:2>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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