  Cooperative communication can improve communication quality in wireless
communication networks through strategic relay selection. However, wireless
cooperative communication networks are vulnerable to the attacks initiated on
relays. Although applying authentication protocols can secure cooperative
communication when the selected relay is malicious, better system throughput
could be obtained without executing authentication protocol when the selected
relay is free from attacker's attack. In this paper, a game theoretic approach
is proposed to quantitatively analyze the attacking strategies of the attacker
who chooses one relay to attack so as to make rational decision on relay
selection and extent of applying authentication protocols, which reaches the
trade-off between system security requirement and quality of service (QoS) in
wireless cooperative communication networks.
