Abstract: . . .  Lecture Notes in Computer Science, LNCS 740, pages 139147. Springer- Verlag, August 1992. [9] Electronic Privacy Information Center. Double Trouble. http://www. epic.org/doubletrouble/. [10] Eran Gabber, Phillip B. Gibbons, David M. Kristol, Yossi Matias, and Alain Mayer. On Secure and Pseudonymous Client-Relationships with Multiple Servers. ACM Transactions on Information and System Security, 2(4):390415, November 1999. 14 Page 15 [11] JAP Anonymity & Privacy . http://anon.inf.tu-dresden.de/. [12] Ari Juels. . . .
. . .  Connections and Onion Routing. IEEE Journal on Selected Areas in Communications, 16(4):482494, May 1998. Special issue on Copyright and Privacy Protection. [16] Michael K. Reiter and Aviel D. Rubin. Crowds: Anonymity for Web Trans- actions. ACM Transactions on Information and System Security (TIS- SEC), 1(1):6692, November 1998. [17] World Wide Web Consortium. Platform for Privacy Preferences (P3P). http://www.w3.org/P3P/. 15  . . .
. . .  16(4):482494, May 1998. Special issue on Copyright and Privacy Protection. [16] Michael K. Reiter and Aviel D. Rubin. Crowds: Anonymity for Web Trans- actions. ACM Transactions on Information and System Security (TIS- SEC), 1(1):6692, November 1998. [17] World Wide Web Consortium. Platform for Privacy Preferences (P3P). http://www.w3.org/P3P/. 15  . . .
. . .  Concerted Research Action (GOA) Mefisto-2000/06 of the Flemish Government. The authors want to thank Jan Teerlinck of Data4s for the helpful discussion on web banner tech- nology, and Caroline Goemans and Prof. Jos Dumortier of ICRI, K.U.Leuven, for their legal input on web banner systems. References [1] Anonymizer. http://www.anonymizer.com/. [2] APES. Anonymity and Privacy in Electronic Services. https://www. cosic.esat.kuleuven.ac.be/apes/. [3] David Chaum. Untraceable Electronic Mail, Return Addresses, and Digital Pseudonyms. . . .
. . .  Connections and Onion Routing. IEEE Journal on Selected Areas in Communications, 16(4):482494, May 1998. Special issue on Copyright and Privacy Protection. [16] Michael K. Reiter and Aviel D. Rubin. Crowds: Anonymity for Web Trans- actions. ACM Transactions on Information and System Security (TIS- SEC), 1(1):6692, November 1998. [17] World Wide Web Consortium. Platform for Privacy Preferences (P3P). http://www.w3.org/P3P/. 15  . . .
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