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

242,491
Number of measurements of browser attributes during study

Participants

3,809
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 30,587 1,007
2022 24,973 717
2023 14,877 888
Number of collected measurements and active participants grouped by year.

Average

416.9
days

Median

92.8
days

Lower quartile

21.9
days

Upper quartile

520.2
days

Average

63.7
Measurements

Median

12.0
Measurements

Lower quartile

5.0
Measurements

Upper quartile

45.0
Measurements




Fingerprints

Average

17.7
Fingerprints

Median

5.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

14.0
Fingerprints

Unique
fingerprints

92.6%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

35.8%
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

65.4%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

46.0
days

Median

22.0
days

Lower quartile

8.0
days

Upper quartile

49.9
days



Avg. stability of trackable fingerprints per participant

Average

50.8
days

Median

27.4
days

Lower quartile

12.9
days

Upper quartile

62.0
days



Max. stability of trackable fingerprints per participant

Average

157.4
days

Median

48.9
days

Lower quartile

15.0
days

Upper quartile

174.9
days

Demographics of participants