TY - GEN
T1 - Secure communication with a relay helping the wire-tapper
AU - Yuksel, Melda
AU - Erkip, Elza
PY - 2007
Y1 - 2007
N2 - A four terminal Gaussian network, composed of a single source-destination pair, a relay and a wire-tapper is considered. Unlike the relay channel with a wire-tapper, it is assumed that the relay assists the wire-tapper, not the destination. The relay's objective is to decrease the achievable secrecy rates. However, since the destination is also allowed to listen to the relay's transmission, it also benefits from the relay in terms of achievable rates. Direct transmission, amplify-and-forward (AF), decode-and-forward (DF) and compress-and-forward (CF) relaying schemes are compared in terms of secrecy rates. It is shown that the best relaying strategy depends on relay's location. Comparison of relaying protocols and best power allocation schemes, when the relay assists the source-destination communication, do not readily extend to the case when the relay assists the wire-tapper.
AB - A four terminal Gaussian network, composed of a single source-destination pair, a relay and a wire-tapper is considered. Unlike the relay channel with a wire-tapper, it is assumed that the relay assists the wire-tapper, not the destination. The relay's objective is to decrease the achievable secrecy rates. However, since the destination is also allowed to listen to the relay's transmission, it also benefits from the relay in terms of achievable rates. Direct transmission, amplify-and-forward (AF), decode-and-forward (DF) and compress-and-forward (CF) relaying schemes are compared in terms of secrecy rates. It is shown that the best relaying strategy depends on relay's location. Comparison of relaying protocols and best power allocation schemes, when the relay assists the source-destination communication, do not readily extend to the case when the relay assists the wire-tapper.
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U2 - 10.1109/ITW.2007.4313141
DO - 10.1109/ITW.2007.4313141
M3 - Conference contribution
AN - SCOPUS:45249083184
SN - 1424415640
SN - 9781424415649
T3 - 2007 IEEE Information Theory Workshop, ITW 2007, Proceedings
SP - 595
EP - 600
BT - 2007 IEEE Information Theory Workshop, ITW 2007, Proceedings
T2 - 2007 IEEE Information Theory Workshop, ITW 2007
Y2 - 2 September 2007 through 6 September 2007
ER -