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Signal interference and packet collisions are typically viewed as negative factors that hinder wireless communication networks. When security is the primary concern, signal interference may actually be very helpful. Starting with a stochastic network model, the authors are able to show that packet collisions caused by jamming nodes can indeed be used effectively to attain new levels of secrecy in multi-terminal wireless environments. To this effect, they propose a practical jamming protocol that uses the well-known RTS/CTS (Request To Send/Clear To Send) handshake of the IEEE 802.11 standard as a signaling scheme. Various jammer selection strategies are investigated depending on the position of source, destination and jamming nodes.
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