Research on MAC security based on D-S evidence theory in wireless sensor networks

This paper considered the security problem at MAC layer in wireless sensor networks,analyzed the security defects in current works on MAC protocols,and then presented a intrusion detection system(IDS) on MAC layer based on D-S evidence theory for the condition that current security system was broken down.In the IDS,selected the collision ratio,data packet's waiting time,RTS packets arrival ratio and the other nodes' alarms as evidences to detect the attacks such as collision attack,unfairness attack and exhaustion attack.This IDS can be used in S-MAC,IEEE 820.15.4 directly.To evaluate the performance of the system,analyzed the IDS with NS-2,the results show that the IDS can defense attacks on MAC layer,and guarantee the wireless sensor networks work well.