Probability and statistics with reliability, queuing and computer science applications
Probability and statistics with reliability, queuing and computer science applications
The Node Distribution of the Random Waypoint Mobility Model for Wireless Ad Hoc Networks
IEEE Transactions on Mobile Computing
Swing & swap: user-centric approaches towards maximizing location privacy
Proceedings of the 5th ACM workshop on Privacy in electronic society
Anonymous Usage of Location-Based Services Through Spatial and Temporal Cloaking
Proceedings of the 1st international conference on Mobile systems, applications and services
An Analysis Study on Zone-Based Anonymous Communication in Mobile Ad Hoc Networks
IEEE Transactions on Dependable and Secure Computing
Silent cascade: enhancing location privacy without communication QoS degradation
SPC'06 Proceedings of the Third international conference on Security in Pervasive Computing
Journal of Network and Computer Applications
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A vehicle can be tracked through its locatable transmission. The broadcast by a source contains its current identity and also allows estimation of its location by receivers of this transmission. This possibility of mapping between the physical entity and the estimated location through the communication broadcast is a threat to privacy. The changes in the location due to motion and the alteration in the temporal identifiers diminish the correlation between location and physical entity. However, such a mapping can still be recognized when an actively communicating node in relative isolation is observed for a sufficient interval of time. This paper addresses the challenges in providing anonymity to a moving vehicle that continually switches identifiers. As a vehicle moves on a road, its neighbors change in accordance to its relative speed with neighboring vehicles. This change in the nature and size of the neighborhood, i.e. the anonymity set, reduces the anonymity of a vehicle. It is shown that the effective size of anonymity set reduces drastically due to change in the neighbors and transmissions by vehicles. The work studies the possibility that a node may retain its anonymity by switching identities in the vicinity of other vehicles to decorrelate its location and identity relation. A heuristic that allows a vehicle to switch its identity at a time and place where the potential of anonymity preservation can be maximized by increasing the anonymity set is proposed. The performance of the proposed heuristic is evaluated in a highway environment with vehicle mobility and dynamic vehicle population. Results indicate that updating pseudonyms in accordance to the heuristic maximizes the size of the anonymity set and through it, the anonymity of a vehicle.