Privacy, Identity and Trust in Context-Aware Mobile Services

Mobile services are increasingly utilizing context information, e.g. user location. There is an intriguing interplay between privacy, identity, security and trust in this domain. Technologies are presented that can help in managing this interplay. Several of these technologies have also been tested in trials carried out recently by Nokia Research Center in Lausanne, Switzerland. We take a look at some key results obtained from these trials. Examples of used technologies are pseudonym management for location privacy purposes, usage control for protection of privacy-sensitive context data and secure multiparty computations for minimizing the amount of needed information exchange.