The active badge location system
ACM Transactions on Information Systems (TOIS)
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
A Probabilistic Room Location Service for Wireless Networked Environments
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
WLAN Location Determination via Clustering and Probability Distributions
PERCOM '03 Proceedings of the First IEEE International Conference on Pervasive Computing and Communications
Secure verification of location claims
WiSe '03 Proceedings of the 2nd ACM workshop on Wireless security
Wireless LAN location-sensing for security applications
WiSe '03 Proceedings of the 2nd ACM workshop on Wireless security
SeRLoc: secure range-independent localization for wireless sensor networks
Proceedings of the 3rd ACM workshop on Wireless security
Robust statistical methods for securing wireless localization in sensor networks
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
ROPE: robust position estimation in wireless sensor networks
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
Tamper resistance: a cautionary note
WOEC'96 Proceedings of the 2nd conference on Proceedings of the Second USENIX Workshop on Electronic Commerce - Volume 2
An asymmetric security mechanism for navigation signals
IH'04 Proceedings of the 6th international conference on Information Hiding
Improved Weighted Centroid Localization in Smart Ubiquitous Environments
UIC '08 Proceedings of the 5th international conference on Ubiquitous Intelligence and Computing
Attacks on public WLAN-based positioning systems
Proceedings of the 7th international conference on Mobile systems, applications, and services
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Localization in WLAN networks has been an active area of research recently. However, most of the previous schemes in this area do not consider the presence of any malicious user within the network. The growing interest in location based services would necessitate the development of a low-cost localization scheme which is robust against the attacks from these malicious users. In this paper, we propose such a low-cost secure localization scheme. The proposed scheme is based on the current access point (AP) capability of transmitting at different power levels. The main idea here is to leverage this capability of APs so that a unique set of the messages transmitted by various APs can be received at every location in the system. The client is expected to transmit back the received messages to the AP it is associated with. The location of the client is then estimated using the set of messages received from the client. In this paper we focus more on the performance of this scheme while discussing briefly its inherent security capabilities. We also describe the implementation of this message based scheme. We then perform extensive experiments and observe that this scheme has similar or better localization accuracy as compared to the traditional signal strength based localization schemes.