Detection and Revocation of Replica Nodes in WSN by Using Mobile Sink

Due to the unattended nature of wireless sensor networks, they are susceptible to replicas attack. The existing replicas detection schemes need to be further improved as to detection probabilities, detection overheads and the balance of detection overheads among the sensor nodes. A new replica detection scheme by mobile sink is proposed. The mobile sink patrols around the network deployment area, visits the one-hop sensor nodes, detects and revokes replica nodes. Detailed analysis about the proposed scheme is provided. The results show that the mobile sink helps to detect and revoke replica nodes effectively without false positives and false negatives, also the detection overheads are small and balanced in the network.