Evercookie
Sign in to savethumb|'Tor Stinks' NSA presentation |page=7 Evercookie (also known as supercookie) is an open-source JavaScript application programming interface (API) that identifies and reproduces intentionally deleted cookies on the clients' browser storage. This behavior is known as a zombie cookie. It was created by Samy Kamkar in 2010 to demonstrate the possible infiltration from the websites that use respawning. Websites that have adopted this mechanism can identify users even if they attempt to delete the previously stored cookies.
Wikidata facts
- Official website
- samy.pl/evercookie
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- source code repository URL
- github.com/samyk/evercookie
via Wikidata · CC0
~10 min read
Article
9 sectionsContents
- Background
- Description
- Applications
- Controversial applications
- KISSMetrics privacy lawsuit
- NSA Tor tracking
- Public attitudes towards data tracking
- See also
- References
thumb|'Tor Stinks' NSA presentation |page=7 Evercookie (also known as supercookie) is an open-source JavaScript application programming interface (API) that identifies and reproduces intentionally deleted cookies on the clients' browser storage. This behavior is known as a zombie cookie. It was created by Samy Kamkar in 2010 to demonstrate the possible infiltration from the websites that use respawning. Websites that have adopted this mechanism can identify users even if they attempt to delete the previously stored cookies.
In 2013, Edward Snowden leaked a top-secret NSA document that showed Evercookie can track Tor (anonymity networks) users. Many popular companies use functionality similar to Evercookie to collect user information and track users. Further research on fingerprinting and search engines also draws inspiration from Evercookie's ability to track a user persistently.