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

178,073
Number of measurements of browser attributes during study

Participants

2,968
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 6,019 772
Number of collected measurements and active participants grouped by year.

Average

381.5
days

Median

99.6
days

Lower quartile

21.0
days

Upper quartile

574.6
days

Average

60.0
Measurements

Median

10.0
Measurements

Lower quartile

4.0
Measurements

Upper quartile

44.0
Measurements




Fingerprints

Average

13.9
Fingerprints

Median

4.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

12.0
Fingerprints

Unique
fingerprints

88.9%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

43.5%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

82.5%
Share of participants that have at least one fingerprint
that is unique amongst all participants

Participants
with trackable fingerprints

66.7%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

50.6
days

Median

27.6
days

Lower quartile

8.8
days

Upper quartile

60.0
days



Avg. stability of trackable fingerprints per participant

Average

50.1
days

Median

28.0
days

Lower quartile

12.2
days

Upper quartile

65.6
days



Max. stability of trackable fingerprints per participant

Average

154.2
days

Median

49.0
days

Lower quartile

14.2
days

Upper quartile

177.9
days

Demographics of participants