Deaf Cooperation for Secrecy in Multiple-Relay Networks

In this paper, the authors investigate the roles of Cooperative Jamming (CJ) and Noise Forwarding (NF) in improving the achievable secrecy rates of a Gaussian WireTap channel (GWT). In particular, they study the role of a deaf helper in confusing the eavesdropper in a GWT channel by either transmitting white Gaussian noise (cooperative jamming) or by transmitting a dummy codeword of no context yet drawn from a codebook known to both the destination and the eavesdropper (noise forwarding). They first study the conditions in which each mode of deaf cooperation improves over the secrecy capacity of the original wiretap channel.

Provided by: University of Mary Washington Topic: Networking Date Added: Sep 2011 Format: PDF

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