1. Location privacy in mobile systems: a personalized anonymization model;Bu,2005
2. Anonymous usage of location-based services through spatial and temporal cloaking;Gruteser,2003
3. The new casper: query processing for location services without compromising privacy;Mokbel,2006
4. Protection of location privacy using dummies for location-based services;Kido,2005
5. Private queries in location based services: anonymizers are not necessary;Ghinita,2008