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With the abundance of location-aware portable devices such as cellphones and PDAs, a new emerging application is to use this pervasive computing platform to learn about the whereabouts of one's friends and relatives. However, issues of trust, security and privacy have hindered the popularity and safety of the systems developed for this purpose. We identify and address the key challenges of enabling...
Protecting users' location information in location-based services, also termed location privacy, has recently garnered significant attention due to its importance in satisfying users' privacy concerns when using location-aware services. Several approaches proposed in the literature blur the user's location in a region by increasing its spatial extent or anonymizing the user among several other users...
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