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

218,147
Number of measurements of browser attributes during study

Participants

3,238
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 15,506 605
Number of collected measurements and active participants grouped by year.

Average

446.0
days

Median

145.2
days

Lower quartile

21.9
days

Upper quartile

553.1
days

Average

67.4
Measurements

Median

13.0
Measurements

Lower quartile

4.0
Measurements

Upper quartile

53.0
Measurements




Fingerprints

Average

17.7
Fingerprints

Median

5.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

15.0
Fingerprints

Unique
fingerprints

91.9%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

38.4%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

83.9%
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

47.2
days

Median

23.1
days

Lower quartile

8.2
days

Upper quartile

54.2
days



Avg. stability of trackable fingerprints per participant

Average

54.0
days

Median

31.5
days

Lower quartile

14.0
days

Upper quartile

66.2
days



Max. stability of trackable fingerprints per participant

Average

168.1
days

Median

62.0
days

Lower quartile

15.8
days

Upper quartile

197.0
days

Demographics of participants