[tor-bugs] #22955 [Core Tor/Tor]: Specify how PrivCount will work with Tor

[Tor Bug Tracker & Wiki]

#22955: Specify how PrivCount will work with Tor
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  nickm
     Type:  task                                 |         Status:
                                                 |  accepted
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  privcount, prop280,                  |  Actual Points:
  TorCoreTeam201711.1                            |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorQ-can
-------------------------------------------------+-------------------------

Comment (by amj703):

 An answer to Nick's question: secret sharing only helps deal with failures
 of Tally Reporters. Handling failures (i.e. crashes/dropouts) of DCs can
 be done simply by having the TRs agree on all the DCs they have data from
 before adding their individual shares from those DCs. Handling malicious
 inputs can be mitigated somewhat by choosing multiple different DC
 subsets, aggregating each one, and taking the median of the resulting
 values.

 Also, I would be interested to hear cypherpunks' concerns in more detail.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22955#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online