An Opportunistic Physical-Layer Approach to Secure Wireless Communications

Bloch, M. R., J. Barros, M. R. D. Rodrigues, and S. W. McLaughlin, "An Opportunistic Physical-Layer Approach to Secure Wireless Communications", Proc. 44th Allerton Conference on Communication Control and Computing, Monticello, IL, pp. 849–854, September, 2006.