TY - JOUR A1 - Langendörfer, Peter A1 - Maaser, Michael A1 - Piotrowski, Krzysztof A1 - Peter, St. T1 - Privacy Preserving Techniques: A Survey and Classification Y1 - 2011 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/5789 ER -