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Newman , Vipan R. Nalla, and Ira S. Moskowitz. In the Proceedings of Privacy Enhancing Technologies workshop (PET 2004), May 2004, pages 1-16. ( BibTeX entry ) · If we think about leaked anonymity as a covert channel between the sender Alice and the adversary Eve, then by measuring covert channel capacity we can get an upper bound on the amount of information Alice could leak.