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|A simple four node network in which cooperation improves the information-theoretic secrecy is studied. The channel consists of two senders, a receiver, and an eavesdropper. One or both senders transmit confidential messages to the receiver, while the eavesdropper tries to decode the transmitted message. The main result is the derivation of a newly achievable rate-equivocation region that is shown to be larger than a rate-equivocation region derived by Lai and El Gamal for the relay-eavesdropper channel. When the rate of the helping interferer is zero, the new rate-equivocation region reduces to the capacity-equivocation region over the wire-tap channel; hence, the new achievability scheme can be seen as a generalization of a coding scheme proposed by Csiszár and Körner.
|Marina, Ninoslav, Yagi, Hideki, Poor, H Vincent. (2011). Improved rate-equivocation regions for secure cooperative communication. 2011 IEEE International Symposium on Information Theory Proceedings, 10.1109/isit.2011.6034100
|Type of Material:
|2011 IEEE International Symposium on Information Theory Proceedings
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