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Recently an alternative of DDoS attacks called shrew attacks or Reduction ofQuality (RoQ) has been identified which is very much difficult to detect. TheRoQ attacks can use source and destination IP address spoofing, and they do nothave distinct periodicity, and may not filter the attack packets precisely. Inthis paper, we propose to design the MAC layer based defense architecture forRoQ attacks in Wireless LAN which includes the detection and response stages.The attackers are detected by checking the RTS CTS packets from the MAC layerand the corresponding attack flows are blocked or rejected. By our simulationresults, we show that our proposed technique achieves reduces the attackthroughput there by increasing the received bandwidth and reducing the packetloss of legitimate users.

A MAC Layer Based Defense Architecture for Reduction of Quality (RoQ) Attacks in Wireless LAN