Anonymity Metrics Revisited

Author Claudia Diaz

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Claudia Diaz

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Claudia Diaz. Anonymity Metrics Revisited. In Anonymous Communication and its Applications. Dagstuhl Seminar Proceedings, Volume 5411, pp. 1-6, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)


In 2001, two information theoretic anonymity metrics were proposed: the "effective anonymity set size" and the "degree of anonymity". In this talk, we propose an abstract model for a general anonymity system which is consistent with the definition of anonymity on which the metrics are based. We revisit entropy-based anonymity metrics, and we apply them to Crowds, a practical anonymity system. We discuss the differences between the two metrics and the results obtained in the example.
  • Anonymity
  • metrics
  • entropy


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