Date Added: Feb 2012
This paper is concerned with improving location-privacy for users accessing location-based services in opportunistic DTNs. The authors design a protocol that offers location privacy through request/reply location obfuscation technique that uses the nodes' own social network to drive the forwarding heuristic. They propose a fully distributed Social-based Location Privacy Protocol (SLPD) that utilizes social ties between nodes to ensure K-Anonymity, i.e. the requesting node's locations cannot be determined from at least k-1 other nodes in its social network. They evaluate SLPD using extensive simulations and real connectivity data traces. They compare their results to a benchmark protocol that requires centralized trusted server.