Mobility

STROBE: Actively Securing Wireless Communications Using Zero-Forcing Beamforming

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Executive Summary

The authors present the design and experimental evaluation of Simultaneous TRansmission with Orthogonally Blinded Eavesdroppers (STROBE). STROBE is a cross-layer approach that exploits the multi-stream capabilities of existing technologies such as 802.11n and the upcoming 802.11ac standard where multi-antenna APs can construct simultaneous data streams using Zero-Forcing Beam-Forming (ZFBF). Instead of using this technique for simultaneous data stream generation, STROBE utilizes ZFBF by allowing an AP to use one stream to communicate with an intended user and the remaining streams to orthogonally "Blind" (actively interfere with) any potential eavesdropper thereby preventing eavesdroppers from decoding nearby transmissions.

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