Humboldt-Universität zu Berlin - Mathematisch-Naturwissenschaftliche Fakultät - Institut für Informatik

Gastvortrag Dr. Andreas Peter

Wir laden Sie herzlich ein zu einem Gastvortrag von Herrn Dr. Andreas Peter, Universiteit Twente, Niederlande.
  • Wann 12.07.2017 von 10:00 bis 23:59
  • Wo 12489 Berlin, Rudower Chaussee 25, Humboldt-Kabinett
  • iCal

Der Titel seines Vortrages ist

"Applications of Somewhat Homomorphic Encryption in Privacy-Enhancing Technologies".

Der Vortrag wird je nach Wunsch der Teilnehmenden auf Deutsch oder Englisch gehalten.

The talk will be given in German or English, depending on the audience's preference.



In 2009, Gentry presented the first Fully Homomorphic Encryption (FHE) scheme, which intuitively supports arbitrary computation over encrypted data without the need to decrypt. While, theoretically, FHE schemes can be used in many settings to provide data privacy (in terms of data confidentiality), in practice they suffer from severe efficiency drawbacks. Somewhat Homomorphic Encryption (SWHE), on the other hand, constitutes a relaxed form of FHE which only supports the computation of a limited set of functions on encrypted data (i.e., functions that can be represented as an arithmetic circuit with fixed and restricted amounts of additions and multiplications).


In this talk, I would like to show that the limited functionality of SWHE schemes can be sufficient to provide data privacy in specific application scenarios and can lead to constructions efficient enough for practical use. Concretely, I will look at two example applications from different domains: (1) enhancing privacy in recommender systems based on social networks and (2) privately outsourcing forensic image recognition. Using the different characteristics of these settings, I will identify some features of SWHE which make the further study of this type of encryption within the area of Privacy-Enhancing Technologies particularly worthwhile.


Short CV:

Andreas Peter graduated with a M.Sc. in mathematics at both the University of Cambridge (UK) and the University of Oldenburg (Germany) in 2008 and 2009, respectively. Subsequently, he received the Ph.D. in computer science from the Technical University of Darmstadt (Germany) in 2013. His Ph.D. thesis deals with the topic of secure outsourcing of computation with a special focus on homomorphic encryption. Since 2014, he is employed as an Assistant Professor at the chair of ''Services, Cybersecurity and Safety'' at the University of Twente (NL). His current research interests include both fundamental and applied security and privacy aspects in IT systems with a focus on privacy-enhancing technologies, cryptographic protocol design and analysis, as well as the application and theory of functional and homomorphic encryption. He served on the program committees of several workshops and conferences devoted to information security and privacy. Since 2015, he serves on the Editorial Board of the MDPI Open Access Journal on Cryptography and the SpringerOpen EURASIP Journal on Information Security.