Johann-Christoph Freytag, Privacy – from accessing databases to location based services
Over the last years it has become apparent that privacy issues become moreand more important when accessing data sources either on the Web or bydatabase management systems. That is, the user does not only want to hidethe query, but also the result of that query from others. In the past theproblem of querying a database privately was solved by organizational ratherthan by technical means.In this talk we describe the problem of querying databases privately moreformally and discuss existing solutions from the area of private informationretrieval (PIR). The lack of efficiency and scalability motivated us lookfor alternative approaches using a so called "secure co-processor" (built byIBM). We introduce a set of algorithms that take advantage of the (physical)properties of the co-processor and show which algorithms are necessary toguarantee privacy for database queries. In the last part of my talk Ibriefly describe our vision how to extend the current privacy approach tolocation-based services, in particular to moving objects such as vehicles(cars). About the speaker: Johann-Christoph Freytag is a full professor for databases and informationsystems (DBIS) at the Computer Science Department of theHumboldt-Universität zu Berlin, Germany. Before joining the department in1994 he was a research staff member at the IBM Almaden Research Center(1985-1987), a researcher at the European Computer-Industry-Research Centre(ECRC, in Munich, Germany, 1987-1989), and the head of Digital's (DEC)Database Technology Center (also in Munich, 1990-1993). He holds a Ph.D. inApplied Mathematics/Computer Science from Harvard University, MA.Dr. Freytag's research interests include all aspects of query processing andquery optimization in object-relational database systems, new developmentsin the database area (such as semi-structured data, data quality, databasesand security, Semantic Web), privacy in database systems, mobile systems andmobility, and applying database technology to applications such as GIS,genomics, and bioinformatics/life science. Dr. Freytag spent two sabbaticals at IBM Research and IBM Development (1997,2001) and was a regular visitor of Microsoft Research and the SQLServergroup, Redmond, as a research scientist (2002, 2005, 2007, 2008). In thelast years he received the IBM Faculty Award 4 times for collaborative workin the areas of databases, middleware, and bioinformatics/life science. Hewas a member of the VLDB Endowment until 2007 organizing VLDB 2003 inBerlin. He heads the German database interest group of the GI (Gesellschaftfür Informatik) since 2007.URL: http://www.dbis.informatik.hu-berlin.de/http://www.dbis.informatik.hu-berlin.de/~freytag
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