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Online Tracking

Historically, about three quarters of websites on the Internet have employed technical measures to track the activities of their users.1 A number of different methods are used, but the ultimate objective of tracking is to build a comprehensive profile of the user.

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Tracking Methods

New tracking methods are constantly under development, so this list will probably always be incomplete.

References and Further Reading


  1. Adam Lerner, Anna K. Simpson, Tadayoshi Kohno, and Franziska Roesner. “Internet Jones and the Raiders of the Lost Trackers: An Archaeological Study of Web Tracking from 1996 to 2016.” 25th USENIX Security Symposium, Austin, TX, August 10-12, 2016. Available Online 

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