Statistics

The following statistics are only preliminary results of the ongoing study and updated hourly.
Please note that the numbers may change over time, for example, due to data cleansing or change of attributes used for fingerprints.

Study

Measurements

200,481
Number of measurements of browser attributes during study

Participants

3,108
Number of participants with at least one measurement




Year Measurements Active participants
2016 28,370 1,501
2017 51,711 1,256
2018 38,675 921
2019 34,016 789
2020 19,282 597
2021 28,427 993
Number of collected measurements and active participants grouped by year.

Average

419.0
days

Median

137.9
days

Lower quartile

22.0
days

Upper quartile

547.1
days

Average

64.5
Measurements

Median

13.0
Measurements

Lower quartile

4.0
Measurements

Upper quartile

49.0
Measurements




Fingerprints

Average

16.2
Fingerprints

Median

5.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

15.0
Fingerprints

Unique
fingerprints

90.9%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

40.5%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

83.3%
Share of participants that have at least one fingerprint
that is unique amongst all participants

Participants
with trackable fingerprints

68.0%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

47.9
days

Median

24.1
days

Lower quartile

8.4
days

Upper quartile

55.3
days



Avg. stability of trackable fingerprints per participant

Average

53.0
days

Median

31.0
days

Lower quartile

14.0
days

Upper quartile

66.4
days



Max. stability of trackable fingerprints per participant

Average

164.2
days

Median

60.4
days

Lower quartile

16.9
days

Upper quartile

190.6
days

Demographics of participants