STOC '87 Proceedings of the nineteenth annual ACM symposium on Theory of computing
Handbook of Applied Cryptography
Handbook of Applied Cryptography
Efficient Public-Key Cryptosystems Provably Secure Against Active Adversaries
ASIACRYPT '99 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
PKC '01 Proceedings of the 4th International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
Aggregate nearest neighbor queries in spatial databases
ACM Transactions on Database Systems (TODS)
The new Casper: query processing for location services without compromising privacy
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
A peer-to-peer spatial cloaking algorithm for anonymous location-based service
GIS '06 Proceedings of the 14th annual ACM international symposium on Advances in geographic information systems
PRIVE: anonymous location-based queries in distributed mobile systems
Proceedings of the 16th international conference on World Wide Web
Preventing Location-Based Identity Inference in Anonymous Spatial Queries
IEEE Transactions on Knowledge and Data Engineering
A TTP-free protocol for location privacy in location-based services
Computer Communications
How to generate and exchange secrets
SFCS '86 Proceedings of the 27th Annual Symposium on Foundations of Computer Science
The Power of Anonymous Veto in Public Discussion
Transactions on Computational Science IV
Non-Exposure Location Anonymity
ICDE '09 Proceedings of the 2009 IEEE International Conference on Data Engineering
Privacy preserving group nearest neighbor queries
Proceedings of the 13th International Conference on Extending Database Technology
Safeguarding location privacy in wireless ad-hoc networks
UbiComp '07 Proceedings of the 9th international conference on Ubiquitous computing
MOBIHIDE: a mobilea peer-to-peer system for anonymous location-based queries
SSTD'07 Proceedings of the 10th international conference on Advances in spatial and temporal databases
Password authenticated key exchange by juggling
Security'08 Proceedings of the 16th International conference on Security protocols
Protecting privacy for group nearest neighbor queries with crowdsourced data and computing
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
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Recently, location privacy during the use of location-based services (LBSs) has raised considerable concerns. There is a wide literature on location privacy from the individual point of view; however, there exist only a few works to support location privacy for a group of users. In this paper, we consider location privacy issues for a group of users who may ask an LBS for a meeting place that minimizes their aggregate distance. The proposed solution, which we call the Group Location Privacy (GLP) protocol, is based on the Anonymous Veto network (AV-net) and homomorphic encryption. It preserves the location privacy of all users even in the case of collusion. Our solution also tries to minimize the LBS overhead for nearest neighbor (NN) queries and communication, i.e., to decrease the number of NN queries sent to an LBS and the number of points of interest (POIs) it returns. Furthermore, GLP greatly decreases the bandwidth usage to a high extent and protects the LBS provider from excessive disclosure of POIs. We discuss the performance and security analysis of the GLP protocol and show that the proposed protocol is secure against partial collusion in a malicious model.