[tor-bugs] #29007 [Core Tor/Tor]: PrivCount proof of concept: work out how to debug PrivCount

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#29007: PrivCount proof of concept: work out how to debug PrivCount
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     Reporter:  teor          |      Owner:  teor
         Type:  defect        |     Status:  assigned
     Priority:  Medium        |  Milestone:  Tor: 0.4.0.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  privcount
Actual Points:                |  Parent ID:  #27908
       Points:                |   Reviewer:
      Sponsor:                |
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 Let's debug PrivCount by splitting statistics into multiple categories:
 * public statistics: information that is already public
 * private statistics: information that is sensitive

 We can safely log public statistics at any log level. We can publish
 public statistics' unencrypted, per-relay values and noise amounts in
 extrainfo descriptors.

 We need a debug mode to log private statistics above info level. When we
 are in debug mode, and not using any public authorities, we can publish
 private statistics' unencrypted, per-relay values and noise amounts in
 extrainfo descriptors.

 We'll work out other debugging mechanisms during the proof of concept
 process.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29007>
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