1. Introduction
Smart phones and other geospatially-aware mobile devices and applications (GAMODAs) are being adopted at an impressive rate [1], [19]. GAMODAs provide and consume what has become referred to as location-based services (LBS) which utilize geographical positioning information to provide added value [45], [4]. The new geospatial capabilities of GAMODAs demonstrate new privacy concerns which have not previously existed to this extent [36].