TY - JOUR A1 - Langendörfer, Peter A1 - Maaser, Michael A1 - Piotrowski, Krzysztof A1 - Peter, St. T1 - Privacy Preserving Techniques: A Survey and Classification Y1 - 2008 ER - TY - GEN A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof A1 - Maaser, Michael T1 - A Distributed Privacy Enforcement Architecture Based on Kerberos Y1 - 2006 ER - TY - CHAP A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof A1 - Maaser, Michael T1 - Charged Location Aware Services: A Privacy Analysis T2 - International Conference on Mobile Business, ICMB 2005, July 11 - 13, 2005, Crowne Plaza Darling Harbour, Sydney, Australia Y1 - 2005 SN - 0-7695-2367-6 SP - 116 EP - 120 PB - IEEE Computer Society CY - Los Alamitos, Calif. [u.a.] ER - TY - CHAP A1 - Piotrowski, Krzysztof A1 - Langendörfer, Peter A1 - Maaser, Michael A1 - Spichal, Gregor A1 - Schwander, Peter T1 - Charged Location Aware Services T2 - Wireless Information Systems, Proceedings of the 4th International Workshop on Wireless Information Systems, WIS 2005 Y1 - 2005 SN - 972-8865-21-X SP - 33 EP - 41 PB - INSTICC Press ER -