Location Privacy in Pervasive Computing
IEEE Pervasive Computing
An architecture for privacy-sensitive ubiquitous computing
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Data Privacy through Optimal k-Anonymization
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
Location Privacy in Mobile Systems: A Personalized Anonymization Model
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
On k-anonymity and the curse of dimensionality
VLDB '05 Proceedings of the 31st international conference on Very large data bases
\ell -Diversity: Privacy Beyond \kappa -Anonymity
ICDE '06 Proceedings of the 22nd International Conference on Data Engineering
The new Casper: query processing for location services without compromising privacy
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Anonymous Usage of Location-Based Services Through Spatial and Temporal Cloaking
Proceedings of the 1st international conference on Mobile systems, applications and services
PRIVE: anonymous location-based queries in distributed mobile systems
Proceedings of the 16th international conference on World Wide Web
Supporting anonymous location queries in mobile environments with privacygrid
Proceedings of the 17th international conference on World Wide Web
Private queries in location based services: anonymizers are not necessary
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
Hiding stars with fireworks: location privacy through camouflage
Proceedings of the 15th annual international conference on Mobile computing and networking
On the Optimal Placement of Mix Zones
PETS '09 Proceedings of the 9th International Symposium on Privacy Enhancing Technologies
Anonymity and Historical-Anonymity in Location-Based Services
Privacy in Location-Based Applications
Distortion-based anonymity for continuous queries in location-based mobile services
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Anonymous Query Processing in Road Networks
IEEE Transactions on Knowledge and Data Engineering
Privacy-aware mobile services over road networks
Proceedings of the VLDB Endowment
Inference attacks on location tracks
PERVASIVE'07 Proceedings of the 5th international conference on Pervasive computing
Towards an information theoretic metric for anonymity
PET'02 Proceedings of the 2nd international conference on Privacy enhancing technologies
On the effectiveness of changing pseudonyms to provide location privacy in VANETS
ESAS'07 Proceedings of the 4th European conference on Security and privacy in ad-hoc and sensor networks
Enabling private continuous queries for revealed user locations
SSTD'07 Proceedings of the 10th international conference on Advances in spatial and temporal databases
Query m-Invariance: Preventing Query Disclosures in Continuous Location-Based Services
MDM '10 Proceedings of the 2010 Eleventh International Conference on Mobile Data Management
An Obfuscation-Based Approach for Protecting Location Privacy
IEEE Transactions on Dependable and Secure Computing
Query-aware location anonymization for road networks
Geoinformatica
Caché: caching location-enhanced content to improve user privacy
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
MobiMix: Protecting location privacy with mix-zones over road networks
ICDE '11 Proceedings of the 2011 IEEE 27th International Conference on Data Engineering
Timing analysis in low-latency mix networks: attacks and defenses
ESORICS'06 Proceedings of the 11th European conference on Research in Computer Security
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Mix-zones are recognized as an alternative and complementary approach to spatial cloaking based location privacy protection. Unlike spatial cloaking techniques that perturb the location resolution through location k-anonymization, mix-zones break the continuity of location exposure by ensuring that users' movements cannot be traced while they are inside a mix-zone. In this paper we provide an overview of some known attacks that make mix-zones on road networks vulnerable and discuss a set of counter measures to make road network mix-zones attack-resilient. Concretely, we categorize the vulnerabilities of road network mix-zones into two classes: one due to the road network characteristics and user mobility, and the other due to the temporal, spatial and semantic correlations of location queries. We propose efficient road network mix-zone construction techniques that are resilient to attacks based on road network characteristics. Furthermore, we enhance the road network mix-zone framework with the concept of delay-tolerant mix-zones that introduce a combination of spatial and temporal shifts in the location exposure of the users to achieve higher anonymity. We study the factors that impact on the effectiveness of each of these attacks and evaluate the efficiency of the counter measures through extensive experiments on traces produced by GTMobiSim at different scales of geographic maps.