Does Matomo use a fingerprint and how is it processed?
Matomo does not use a fingerprint to track visitors.
Instead of a fingerprint, Matomo uses the most privacy-friendly industry-leading measures to protect users privacy instead of fingerprinting: the
config_id is used by Matomo to group different actions into « visits » during a short window of up to 24-hours.
config_id is a randomly-seeded, privacy-enabled, time-limited hash of a limited set of the visitor’s settings and attributes. The
config_id or config hash is a string calculated for a visitor based on their operating system, browser, browser plugins, IP address and browser language. Unlike other tools that use fingerprinting, Matomo does not do fingerprint, and the
config_id is only valid for less than 24 hours and only valid for one particular website domain:
config_idis only valid for 24 hours maximum and is then rotated, meaning the same visitor will have a different
config_idrandomly changes and is fully anonymised every 24 hours. The randomly-generated seed is discarded each day and cannot be recovered.
- the website ID is used to process the
config_idwhich means that on your Matomo (Piwik) instance, a given user/visitor will always have a different
config_idwhen browsing your different websites and domains.
- the IP address used to create the
config_idwill be the anonymised IP address when you have enabled IP anonymisation which is the default privacy setting in Matomo (when you select « Also use anonymised IP when enriching visit: No » then the full IP address will be used in the hash calculation).
Learn more how does Matomo detect unique and returning visitors with User ID, Visitor ID from cookie.