Physical Layer Attacks on Unlinkability in Wireless LANs
PETS '09 Proceedings of the 9th International Symposium on Privacy Enhancing Technologies
The impact of directional antenna models on simulation accuracy
WiOPT'09 Proceedings of the 7th international conference on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
Aegis: physical space security for wireless networks with smart antennas
IEEE/ACM Transactions on Networking (TON)
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In this paper, we focus on securing communication over wireless data networks from malicious eavesdroppers, using smart antennas. While conventional cryptography based approaches focus on hiding the meaning of the information being communicated from the eavesdropper, we consider a complimentary class of strategies that limit knowledge of the existence of the information from the eavesdropper. We profile the performance achievable using simple beamforming strategies using a newly defined metric called exposure region. We then present three strategies within the context of an approach called virtual arrays of physical arrays to significantly improve the exposure region performance of a wireless LAN environment. Using simulations and analysis, we validate and evaluate the proposed strategies.