Date Added: Apr 2013
In Wireless Sensor network, nodes are interconnected and information is shared among them. In a situation, many attacks are involved to misuse the wireless sensor network. One of the attacks is replica node replication attack, in which the adversary can detain and conciliation of sensor nodes by hacking IP address of node to make replicas of them and then mount a variety of attacks with these replicas. Opponent controls the entire network and misuse the whole network. The author's goal is to detect and block the nodes which are captured by attacker. Sequential Probability Ratio Test is a technique which is used to find the capture node by using two approaches.