Date Added: Aug 2010
This paper presented the first work studying the scalability of keyless secrecy in a generalized network setting when the eavesdropper locations are unknown. The authors described a novel construction allowing nodes to generate artificial noise to overcome eavesdroppers. They then characterized the trade-offs between achievable node throughput and allowable number of eavesdroppers, both for independent and collaborating eavesdroppers. They also derived sufficient conditions on number of eavesdroppers so as to achieve a non-zero throughput. The ongoing work involves improving the constants in the scaling laws. Considering the case of spatially distributed collaborating eavesdroppers is also under investigation.