earticle

영어

Wormhole attack is a coordinated attack that launched by two or more malicious node. With a high quality private link malicious node, attracted traffic, attacked routing protocol, destroyed network topology, has a great threat to space information network. We propose a wormhole attack detection algorithm based on abnormal topology and time delay in space information network and the algorithm is mainly composed of two phases: finding abnormal topology and getting the malicious node. According to the number of nodes which are mutually non-one-hop neighbors in the normal network and the abnormal topology in backbone get the suspicious neighbors. To confirm the fake link, uses the round trip time to detect suspicious neighbors. Sends warning messages to isolate false neighbors or malicious nodes to ensure the security of the network. Using the network simulation software NS2 analyses the performance of the detection algorithm. The simulation results show that the proposed algorithm can detect wormhole also has high detection rate and a low false positive rate.