Date Added: Nov 2010
Recently, there has been a dramatic increase in the number of location-based services, with services like Foursquare or Yelp having hundreds of thousands of users. A user's location is a crucial factor for enabling these services. Many services rely on users to correctly report their location. However, if there is an incentive, users might lie about their location. A location proof architecture enables users to collect proofs for being at a location and services to validate these proofs. It is essential that this proof collection and validation does not violate user privacy. The authors introduce VeriPlace, a location proof architecture with user privacy as a key design component.