Re: [tor-bugs] #25669 [Core Tor/Tor]: Privcount: blinding and encryption should be finished up

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

#25669: Privcount: blinding and encryption should be finished up
-------------------------------------------+-------------------------------
 Reporter:  nickm                          |          Owner:  (none)
     Type:  enhancement                    |         Status:
                                           |  needs_revision
 Priority:  Medium                         |      Milestone:  Tor:
                                           |  0.3.5.x-final
Component:  Core Tor/Tor                   |        Version:
 Severity:  Normal                         |     Resolution:
 Keywords:  privcount, 035-roadmap-master  |  Actual Points:
Parent ID:  #22898                         |         Points:
 Reviewer:                                 |        Sponsor:
-------------------------------------------+-------------------------------
Changes (by teor):

 * status:  new => needs_revision


Comment:

 The code is here:
 https://github.com/nmathewson/privcount_shamir/tree/master/rust

 It needs two changes:
 * use rejection sampling to avoid a non-uniform distribution of values,
 and amend the spec:
   *
 https://github.com/nmathewson/privcount_shamir/blob/master/rust/src/data.rs#L84
 * now that i128 is in stable, amend the i128 checks:
   *
 https://github.com/nmathewson/privcount_shamir/blob/master/rust/src/lib.rs#L1
   *
 https://github.com/nmathewson/privcount_shamir/blob/master/rust/src/math.rs#L287
   *
 https://github.com/nmathewson/privcount_shamir/blob/master/rust/src/math.rs#L370

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25669#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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