Trajectory privacy in location-based services and data publication
ACM SIGKDD Explorations Newsletter
Optimizing mixing in pervasive networks: a graph-theoretic perspective
ESORICS'11 Proceedings of the 16th European conference on Research in computer security
Preserving location privacy for continuous queries on known route
ICISS'11 Proceedings of the 7th international conference on Information Systems Security
Microaggregation- and permutation-based anonymization of movement data
Information Sciences: an International Journal
Middleware for location privacy: an overview
Proceedings of the 2012 ACM Research in Applied Computation Symposium
Proceedings of the Third ACM SIGSPATIAL International Workshop on Querying and Mining Uncertain Spatio-Temporal Data
Combining social authentication and untrusted clouds for private location sharing
Proceedings of the 18th ACM symposium on Access control models and technologies
A classification of location privacy attacks and approaches
Personal and Ubiquitous Computing
Anonymizing continuous queries with delay-tolerant mix-zones over road networks
Distributed and Parallel Databases
Optimizing mix-zone coverage in pervasive wireless networks
Journal of Computer Security - Research in Computer Security and Privacy: Emerging Trends
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This paper presents MobiMix, a road network based mix-zone framework to protect location privacy of mobile users traveling on road networks. In contrast to spatial cloaking based location privacy protection, the approach in MobiMix is to break the continuity of location exposure by using mix-zones, where no applications can trace user movement. This paper makes two original contributions. First, we provide the formal analysis on the vulnerabilities of directly applying theoretical rectangle mix-zones to road networks in terms of anonymization effectiveness and attack resilience. We argue that effective mix-zones should be constructed and placed by carefully taking into consideration of multiple factors, such as the geometry of the zones, the statistical behavior of the user population, the spatial constraints on movement patterns of the users, and the temporal and spatial resolution of the location exposure. Second, we develop a suite of road network mix-zone construction methods that provide higher level of attack resilience and yield a specified lower-bound on the level of anonymity. We evaluate the MobiMix approach through extensive experiments conducted on traces produced by GTMobiSim on different scales of geographic maps. Our experiments show that MobiMix offers high level of anonymity and high level of resilience to attacks compared to existing mix-zone approaches.