TY - GEN
T1 - Detecting malicious behavior in cooperative diversity
AU - Dehnie, Sintayehu
AU - Senear, Huserv T.
AU - Memon, Nasir
PY - 2007
Y1 - 2007
N2 - We consider a cooperative diversity scheme where a relay cooperatively enhances communication between a source and destination. In cooperative diversity, due to lack of a mechanism to ensure relay's adherence to the cooperation strategy, the receiver is often assumed to be passive. In this paper, we consider a smart destination which examines relay's signal prior to applying diversity combining. This is attributed to the assumption that relay may not conform to the cooperation strategies at all times and may behave maliciously. Based on this assumption, we develop a statistical detection technique to mitigate malicious relay behavior in decode-and-forward cooperation strategy. The detection technique statistically compares the signals received from the two diversity branches to determine the relay's behavior. As the uncertainty in the direct path is only due to the channel, correlation of received signals from the source and relay provides a basis to characterize relay behavior. We show, both by analysis and simulation, that a malicious relay reduces the correlation between the received signals in the diversity branch. Finally, we investigate bit-error rate and outage behavior performance in the presence of a smart destination.
AB - We consider a cooperative diversity scheme where a relay cooperatively enhances communication between a source and destination. In cooperative diversity, due to lack of a mechanism to ensure relay's adherence to the cooperation strategy, the receiver is often assumed to be passive. In this paper, we consider a smart destination which examines relay's signal prior to applying diversity combining. This is attributed to the assumption that relay may not conform to the cooperation strategies at all times and may behave maliciously. Based on this assumption, we develop a statistical detection technique to mitigate malicious relay behavior in decode-and-forward cooperation strategy. The detection technique statistically compares the signals received from the two diversity branches to determine the relay's behavior. As the uncertainty in the direct path is only due to the channel, correlation of received signals from the source and relay provides a basis to characterize relay behavior. We show, both by analysis and simulation, that a malicious relay reduces the correlation between the received signals in the diversity branch. Finally, we investigate bit-error rate and outage behavior performance in the presence of a smart destination.
KW - Communication system security
KW - Diversity techniques
KW - Fading channels
KW - Relay channel
UR - http://www.scopus.com/inward/record.url?scp=44049108259&partnerID=8YFLogxK
U2 - 10.1109/CISS.2007.4298437
DO - 10.1109/CISS.2007.4298437
M3 - Conference contribution
AN - SCOPUS:44049108259
SN - 1424410371
SN - 9781424410378
T3 - Forty-first Annual Conference on Information Sciences and Systems, CISS 2007 - Proceedings
SP - 895
EP - 899
BT - Forty-first Annual Conference on Information Sciences and Systems, CISS 2007 - Proceedings
T2 - 41st Annual Conference on Information Sciences and Systems, CISS 2007
Y2 - 14 March 2007 through 16 March 2007
ER -