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Re: [tor-bugs] #23414 [Core Tor/Tor]: rep_hist_format_hs_stats() should add noise, then round

#23414: rep_hist_format_hs_stats() should add noise, then round
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  teor
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.6.2-alpha
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-relay, security-low, privcount,  |  Actual Points:
  031-backport, 030-backport, 029-backport, 028  |
  -backport-maybe, 026-backport-maybe            |
Parent ID:  #23061                               |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * status:  needs_review => needs_revision


Comment:

 This needs another fix: if we treat signal INT_MIN and INT_MAX as if they
 are infinite (saturating arithmetic), then the security guarantees are
 much easier to reason about. And the explanations are shorter, too :-)

 Also, the code would be simpler, and the explanations shorter, if we added
 the noise when we reset the counter. I opened #23501 for this.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23414#comment:3>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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