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

251,315
Number of measurements of browser attributes during study

Participants

3,847
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 23,701 965
Number of collected measurements and active participants grouped by year.

Average

427.2
days

Median

119.9
days

Lower quartile

22.1
days

Upper quartile

520.9
days

Average

65.3
Measurements

Median

13.0
Measurements

Lower quartile

5.0
Measurements

Upper quartile

47.0
Measurements




Fingerprints

Average

18.6
Fingerprints

Median

6.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

15.0
Fingerprints

Unique
fingerprints

92.9%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

34.8%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

83.5%
Share of participants that have at least one fingerprint
that is unique amongst all participants

Participants
with trackable fingerprints

65.7%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

45.6
days

Median

21.9
days

Lower quartile

8.0
days

Upper quartile

49.4
days



Avg. stability of trackable fingerprints per participant

Average

52.3
days

Median

30.0
days

Lower quartile

13.9
days

Upper quartile

63.2
days



Max. stability of trackable fingerprints per participant

Average

162.8
days

Median

56.2
days

Lower quartile

15.8
days

Upper quartile

175.1
days

Demographics of participants