Velocity similarity anonymization for continuous query Location based services

In this paper, we introduced a novel query privacy algorithm called the direction speed dynamic cloaking algorithm (DSDCA) for continuous query Location based services (LBS) that considered users with similar direction, similar speed, and travelling with the same transport mode for cloaking. Experimental evaluation of the algorithm on a real world map showed that our model protects privacy of users during the entire query period whiles allowing users´ choice of privacy requirements. It significantly improved quality of service (QoS), exhibited a good success rate and achieved an excellent performance measure as compared to other algorithms.