We study privacy-preserving tests for proximity: Alice can test if she is close to Bob without
either party revealing any other information about their location. We describe several secure …

Location proximity schemes have been adopted by social networks and other smartphone
apps as a means of balancing user privacy with utility. However, misconceptions about the …

A privacy-aware proximity detection service determines if two mobile users are close to each
other without requiring them to disclose their exact locations. Existing proposals for such …

Location privacy is of utmost concern for location-based services. It is the property that a
person's location is revealed to other entities, such as a service provider or the person's …

Although location-based applications have existed for several years, verifying the
correctness of a user's claimed location is a challenge that has only recently gained …

A significant and growing class of location-based mobile applications aggregate position
data from individual devices at a server and compute aggregate statistics over these position …

Using geosocial applications, such as FourSquare, millions of people interact with their
surroundings through their friends and their recommendations. Without adequate privacy …

A location-based service called friend-locator notifies a user if the user is geographically
close to any of the user's friends. Services of this kind are getting increasingly popular due to …

The goal of ubiquitous computing research is refine devices to the where their use is
transparent. For many applications with mobile devices, transparent operation requires that …

The growing popularity of location-based systems, allowing unknown/untrusted servers to
easily collect huge amounts of information regarding users' location, has recently started …