Identifying Users Across Social Tagging Systems


  • Tereza Iofciu Leibniz University Hannover
  • Peter Fankhauser Leibniz University Hannover
  • Fabian Abel TU Delft
  • Kerstin Bischoff Leibniz University Hannover


How much do tagging activities tell about a user? Is it possible to identify people in Delicious based on the tags, which they use in Flickr? In this paper we study those questions and investigate whether users can be identified across social tagging systems. We combine two kinds of information: their user ids and their tags. We introduce and compare a variety of approaches to measure the distance between user profiles for identification. With the best performing combination we achieve, depending on the actual settings, accuracies of between 60% and 80% which demonstrates that the traces of Web 2.0 users can reveal quite much about their identity.




How to Cite

Iofciu, T., Fankhauser, P., Abel, F., & Bischoff, K. (2021). Identifying Users Across Social Tagging Systems. Proceedings of the International AAAI Conference on Web and Social Media, 5(1), 522-525. Retrieved from