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

188,344
Number of measurements of browser attributes during study

Participants

3,030
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 16,290 890
Number of collected measurements and active participants grouped by year.

Average

395.9
days

Median

119.1
days

Lower quartile

21.8
days

Upper quartile

558.3
days

Average

62.2
Measurements

Median

12.0
Measurements

Lower quartile

4.0
Measurements

Upper quartile

46.0
Measurements




Fingerprints

Average

15.0
Fingerprints

Median

5.0
Fingerprints

Lower quartile

2.0
Fingerprints

Upper quartile

14.0
Fingerprints

Unique
fingerprints

89.9%
Share of fingerprints that are unique amongst participants

Trackable
fingerprints

41.9%
Share of fingerprints that are both unique and stable over time

Participants
with unique fingerprints

82.9%
Share of participants that have at least one fingerprint
that is unique amongst all participants

Participants
with trackable fingerprints

67.8%
Share of participants that have at least one fingerprint
that is both unique and stable over time


Stability of trackable fingerprints

Average

49.2
days

Median

27.0
days

Lower quartile

8.9
days

Upper quartile

56.2
days



Avg. stability of trackable fingerprints per participant

Average

51.5
days

Median

30.1
days

Lower quartile

14.0
days

Upper quartile

66.4
days



Max. stability of trackable fingerprints per participant

Average

157.8
days

Median

56.1
days

Lower quartile

16.6
days

Upper quartile

180.5
days

Demographics of participants