[tor-bugs] #22422 [Core Tor/Tor]: Add noise to PaddingStatistics

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Jun 5 18:01:35 UTC 2017


#22422: Add noise to PaddingStatistics
--------------------------+------------------------------------
 Reporter:  teor          |          Owner:
     Type:  defect        |         Status:  new
 Priority:  High          |      Milestone:  Tor: 0.3.1.x-final
Component:  Core Tor/Tor  |        Version:  Tor: 0.3.1.1-alpha
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:  0.5
 Reviewer:                |        Sponsor:
--------------------------+------------------------------------
Changes (by mikeperry):

 * cc: karsten (added)


Comment:

 Karsten and I discussed this about a year ago, and came to the conclusion
 that rounding to 10k cells was sufficient, especially since these counts
 are accumulated over a full 24 hour period. Relays are already reporting
 higher resolution for BW read and write history, and relays that opt in
 have higher resolution for cell statistics too.

 Is there a specific thing we're worried about with the current numbers?

 Can we quantify the additional privacy we'd get from noise vs just making
 the rounding larger? Should we do one, or the other, or both?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22422#comment:2>
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