Freitag, 19. Dezember 2014

[HIForum] [Kolloquium] INVITATION to the UHH Informatik Kolloquium - Mo 12.01.2015 at 17:15 in D125 - Prof. Johann-Christoph Freytag, DBIS, Humboldt-Universität Berlin

This is an invitation to the "UHH Informatik Kolloquium".
https://www.inf.uni-hamburg.de/de/home/news/kolloquium/wise14-15.html



SPEAKER:
Prof. Johann-Christoph Freytag
DBIS, Humboldt-Universität zu Berlin
https://www.inf.uni-hamburg.de/de/home/news/kolloquium/wise14-15/freytag.ht
ml

http://www.dbis.informatik.hu-berlin.de/index.php?id=12


DATE:
MONDAY, 12.01.2015, 17:15


PLACE:
Informatikum, Room D-125
http://www.inf.uni-hamburg.de/de/service/location



--------------------------------------------------------------
TOPIC: When to say NO for Privacy Protection while answering Queries
--------------------------------------------------------------


This talk will be held in English or German, according to preference



ABSTRACT:
This talk presents privacy concepts that keep the balance between utility
and privacy when returning answers to a sequence of queries. In particular
we show how to model the (increasing) knowledge of an adversary resulting
from the answers to queries by a sequence of bipartite graphs. Those
graphs provide the foundation for algorithms that decide when a privacy
breach occurs (might occur) and how to balance the need for accurate
responses versus the right for privacy. Examples demonstrate the
intricacies of managing this trade-off.

We present our results in the context of k-anonymity, a popular concept
for privacy which has been the focus for intense research for the last
decade. However, our results are usable in the context of other privacy
approaches as well.

This work has been done in cooperation with Lukas Dölle,
Humboldt-Universität zu Berlin.



BIO:
Johann-Christoph Freytag is currently full professor for Databases and
Information Systems (DBIS) at the Computer Science Department of the
Humboldt-Universität zu Berlin, Germany. Before joining the department in
1994, 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
Database Technology Center (also in Munich, 1990-1993). He holds a Ph.D.
in Applied Mathematics/Computer Science from Harvard University, MA.

Freytag's research interests include all aspects of query processing and
query optimization in object-relational database systems, new developments
in the database area (such as semi-structured data, data quality,
databases and security), privacy in database systems, and data quality as
well as applying database technology to applications such as GIS,
genomics, and bioinformatics/life science.

In the last years he received the IBM Faculty Award four times for
collaborative work in the areas of databases, middleware, and
bioinformatics/life science, as well as the HP Innovation Award of
excellent cooperation in the area of databases and workflow systems. He
organized the VLDB conference in Berlin in 2003 and was a member of the
VLDB Endowment (2001-2007). Since 2009 Freytag heads the German database
interest group of the GI (Fachbereich DBIS, Gesellschaft für Informatik).





CONTACT:
Prof. Hannes Federrath - SVS
Computer Science, University of Hamburg
Phone: +49-(0)40-42883-2358

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