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[Institut fuer Informatik] [Leerraum] [Humboldt-Universitaet zu Berlin]

Jan Hendrik Nielsen

Postal Address: Institut für Informatik
Humboldt-Universität zu Berlin
Unter den Linden 6
D-10099 Berlin
Domicile: Rudower Chaussee 25
D-12489 Berlin
Room: 4.207
Phone: +49 30 2093-3026
Fax: +49 30 2093-3010
Email: nielseja@informatik.hu-berlin.de>(PGP)



My research focuses on privacy-preserving medical data publication. Medical data contains sensitive information about patients. Therefore, publication of this data must not allow information inference regarding the patient. Access control, as well as data encryption provides methods of data protection, hence, protecting the patients privacy. These approaches become unfeasible if data has to be made available for a large quantity of probably unknown persons. Data anonymization techniques are an alternative approach, which allows the privacy aware publication of data. Usually anonymized data is being modified to allow only limited information gain. Data anonymization concepts are the basis of my research.

Distributed anonymzation-Protocols

I'm also interested in research on data anonymization in a distributed environment. In this context a distributed environment refers to data being split up to multiple participating instances, which collect, store and anonymize only a short fraction of the data. Distributed anonymization protocols utilize cryptographic algorithms to protect the patients privacy during the anonymization phase. One disadvantage of current protocols is the large time complexity issued by the use of cryptographic algorithms. Furthermore, current anonymization concepts where not being designed to work in a distributed environment. Therefore, data is often modified too much, which weakens the utility of the data. One key aspect of my research deals with the design of distributed anonymization protocols, that overcome the aforementioned difficulties.

Service-oriented architectures

One question arising in the context of distributed systems is the of the architectural pattern used. Service-oriented architectures provide a promising concept for software components being subject to frequent requirement adaption. Service-oriented architectures form an interesting basis for a distributed anonymization protocol. Data publication in a distributed environment is challenging. One the one hand the anonymization has to be strong enough to withstand future attempts to break it. On the other hand situations may occur where the data holder is in need of the original, unaltered data. Generating anonymized data on a per request basis using service-oriented architectures keeping the original data intact provides great flexibility. Hence, Service-oriented architectures form the third aspect of my research.


D2Pt: Privacy-Aware Multiparty Data Publication (abstract)

Veröffentlicht am: 2015/03
AutorInnen: Jan Hendrik Nielsen, Daniel Janusz, Jochen Taeschner, Johann-Christoph Freytag
Veröffentlicht in: Proceedings of the 16. GI-Fachtagung Datenbanksysteme für Business, Technologie und Web (BTW), Hamburg, Germany
(pdf) (ps) (ppt)
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Verteilte Anonymisierung von vertikal partitionierten Daten (abstract)

Veröffentlicht am: 2013/03
AutorInnen: Jan Hendrik Nielsen
Veröffentlicht in: Diplomarbeit an der Humboldt-Universität zu Berlin
(pdf) (ps) (ppt)
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Veröffentlichung anonymer Daten in verteilten Datenbanken (abstract)

Veröffentlicht am: 2011/12
AutorInnen: Jan Hendrik Nielsen
Veröffentlicht in: Studienarbeit an der Humboldt-Universität zu Berlin
(pdf) (ps) (ppt)
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  • Since June 2013 member of the Graduate School SOAMED

Workshops and Conferences

Technical Chair

  • Innovationsforum Semantic Media Web – Eine Einladung an Wissenschaft und Wirtschaft (2014)
  • Fachtagung Semantische Technologien - Verwertungstrategien und Konvergenz von Metadaten (2013)


  • 16th conference on "Database Systems for Business, Technology, and Web" (BTW 2015) - held by Daniel Janusz
  • 8th Joint Workshop of the German Research Training Groups in Computer Science (Dagstuhl 2014)


WS 2013/14

Student Advisor


  • "Evaluation des Algorithmus FtEDPP2GA" (Studienarbeit) Jochen Taeschner
    Erstbetreuer: Daniel Janusz


[Punkt]  Artin Avanes

[Punkt]  Rico Bergmann

[Punkt]  Oliver Berthold

[Punkt]  Bruno Cadonna

[Punkt]  Lukas Dölle

[Punkt]  Dr. Rainer Eckstein

[Punkt]  Olaf Hartig

[Punkt]  Ralf Heese

[Punkt]  Sven Herschel

[Punkt]  Dr. Stephan Heymann

[Punkt]  Frank Huber

[Punkt]  Heiko Müller

[Punkt]  Chokri Ben Necib

[aktiver Punkt]  Jan Hendrik Nielsen

[Punkt]  Peter Rieger

[Punkt]  Matthias J. Sax

[Punkt]  Ulrike Scholz

[Punkt]  Katja Tham