Auflistung nach Autor:in "Nilges, Tobias"
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- KonferenzbeitragA provably privacy preserving video surveillance architecture for an assisted living community(Informatik 2014, 2014) Huber, Matthias; Müller-Quade, Jörn; Nilges, Tobias; Thal, CarolinVideo surveillance offers many advantages but also introduces privacy issues. We propose a video surveillance architecture that preserves privacy by providing different levels of anonymization. To this end, we model an assisted living scenario and show that our architecture can provide provable privacy under explicit assumptions while maintaining the utility of the architecture. This shows that video surveillance, tailored to specific scenarios, can be applied in a privacy preserving way.
- KonferenzbeitragStructural composition attacks on anonymized data(Sicherheit 2014 – Sicherheit, Schutz und Zuverlässigkeit, 2014) Nilges, Tobias; Müller-Quade, Jörn; Huber, MatthiasAnonymized releases of databases are increasingly available in public. The composition of two releases does not necessarily fulfil any anonymity notion, even if the individual releases do fulfil that anonymity notion on their own. In this paper, we study composition scenarios and provide formalizations. We introduce a formal framework to study the composition of databases on a structural level and show the equivalence of the composition scenarios used in the literature. We show that known attacks on anonymity notions can be reduced to two simple properties and only need limited side information.