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Node Replication Attack Detection Algorithms in Wireless Sensor Networks: A Survey.

The sensor networks are often deployed in hostile environments and are not attended for long time. Deployment of these networks is increased in the recent years, as they help in monitoring and analyzing different properties of the environment. The application of wireless sensor network starts from environment, household monitoring and ranging up to critical military applications. The sensor nodes in the network are prone to different kinds of novel attacks. An attacker, with little effort, may physically capture nodes, exploits the information on the node, reprogram the node and create replicas, and secretly insert these replicas at strategic locations within the network. This is called as node replication attack. Since these replicas have legitimate access to the network (legitimate IDs, keys, other security credentials, etc.), they can participate in the network operations in the same way as a legitimate node, and thus a large variety of insider attacks takes over the network. Using such nodes the attacker can corrupt the data flowing through the network, also the attacker can disconnect some part of the network with other part of the network. Detection of node replication attack is therefore important. So, in this report we will come to know about some node replication detection schemes, out of which some depend primarily on centralized mechanisms where the base station plays very important role, and others depend on distributed detection schemes. The detection probabilities and communication overhead are the major concern while proposing and using the detection techniques. Hence, the design of efficient algorithm to detect node identity replicas is still an open and demanding issue.