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Re: [tor-bugs] #10218 [Tor]: Provide "users-per-transport-per-country" statistics for obfsbridges
#10218: Provide "users-per-transport-per-country" statistics for obfsbridges
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Reporter: asn | Owner:
Type: enhancement | joelanders
Priority: Medium | Status:
Component: Tor | assigned
Severity: Normal | Milestone: Tor:
Keywords: tor-bridge tor-pt bridgedb-dist | 0.2.8.x-final
028-triage | Version:
Parent ID: | Resolution:
Sponsor: | Actual Points:
| Points: medium
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Comment (by asn):
Another way to cheaply (and partially) bypass the privacy issue here would
be to say "Only report statistics from countries with more than N=500
users of $PT" where PT can be obfs3, obfs4, meek, etc. We can also tweak
the threshold N to be 1000 or more if needed.
This way we ensure that only very popular pluggable transports will be
displayed in the stats. And because the number of users is (arguably) that
large, this should not reveal information about individual users. We can
also do this on top of the regular noise that we would add.
While this is definitely not ideal, this statistic can be useful for us
because it will tell us which PTs are popular in which countries. If a PT
is popular and it stops being in the list of statistics (because the
number of users dropped) we still learn that a censorship event is
happening.
As we understand better this statistic, we can then add more noise or
decrease the threshold N accordingly.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10218#comment:19>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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