[tor-bugs] #13445 [Tor Browser]: Adjust TBB window size

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#13445: Adjust TBB window size
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     Reporter:  cypherpunks  |      Owner:  tbb-team
         Type:  enhancement  |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  Tor Browser  |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by gacar):

 According to very simplistic calculations, it'd be slightly worse than the
 existing case:

 Without any resizing, entropy of the screen resolution distribution: 5.61
 bits, # of bins: 27471, # of data points: 2,996,391.

 With different resizing parameters:
 TBB max width, Entropy (bits), # of bins (anon. sets), Screen utilization
 (TBB area/screen area)
 ============
 1000px: 2.79 bits, 87 bins, %57.87 (current countermeasure)
 1200px: 3.12 bits, 108 bins, %63.96
 1400px: 3.23 bits, 133 bins,  %67.15

 Also to note, the biggest anon. set for the max_w = 1400px case is
 1400x900. This means, a lot people with 1400+ horizontal resolution  would
 benefit from this change, without being easily identifiable.

 5 Largest anonymity sets for max_w = 1400
 ==============
 1400x900, 710369
 1200x600, 698672
 1400x700, 397267
 1200x800, 351765
 1400x1000, 300197

 5 Largest anonymity sets for max_w = 1000
 ==============
 1000x600, 902896
 1000x900, 711738
 1000x700, 443070
 1000x800, 381586
 1000x1000, 314155


 But let me take a few days more to plot the anonymity set distributions
 with respect to different resizing parameters, as the overall entropy
 doesn't tell much about the details of the distribution.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13445#comment:2>
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