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

185,673
Number of measurements of browser attributes during study

Participants

3,021
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 13,619 871
Number of collected measurements and active participants grouped by year.

Average

390.6
days

Median

98.1
days

Lower quartile

21.8
days

Upper quartile

554.5
days

Average

61.5
Measurements

Median

12.0
Measurements

Lower quartile

4.0
Measurements

Upper quartile

45.0
Measurements




Fingerprints

Average

14.7
Fingerprints

Median

5.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

13.0
Fingerprints

Unique
fingerprints

89.7%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

42.3%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

82.8%
Share of participants that have at least one fingerprint
that is unique amongst all participants

Participants
with trackable fingerprints

67.7%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

49.5
days

Median

26.9
days

Lower quartile

8.7
days

Upper quartile

56.6
days



Avg. stability of trackable fingerprints per participant

Average

50.9
days

Median

29.4
days

Lower quartile

14.0
days

Upper quartile

65.6
days



Max. stability of trackable fingerprints per participant

Average

155.4
days

Median

55.6
days

Lower quartile

15.9
days

Upper quartile

175.9
days

Demographics of participants