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Welcome to the PriLoc Project


The PriLoc Project (Privacy aware Location management) focuses on concepts and algorithms for the secure management of private position information in non-trusted location server infrastructures.

Driven by the availability of positioning systems such as GPS, powerful smartphones like the iPhone or Google Android phones, and cheap flat rates for mobile devices, location-based applications enjoy growing popularity. Typically, advanced location-based applications such as friend finders or geo-social networks are based on location server infrastructures storing mobile user positions to ensure scalability by enabling the sharing of user positions between multiple applications. This relieves the mobile device from sending position information to each application individually. Instead, the mobile device updates the position at the location service, and location-based applications query the location service for mobile object positions.

However, storing data on location servers raises privacy concerns if the user does not trust the provider of the location service. Multiple incidents in the past have shown that even if the provider is not misusing the data himself, private information can be revealed due to attacks, leaking, or loss of data. Therefore, the assumption of a trusted location service is questionable, and technical concepts are required to ensure location privacy without requiring a trusted third party.

The PriLoc Project investigates such concepts for the secure management of private position information on non-trusted location server infrastructures. In particular, we designed a novel position sharing approach with interesting properties such as no single point of failure w.r.t. privacy, graceful degradation of privacy with the number of compromised servers, and support of different, individual precision levels for location-based applications with different quality demands and trust levels.

For more information about the research challenges, please visit the research page, or have a look at our publications.