International Journal of Engineering and Technology

Wireless Sensor Network (WSN) is a group of distributed independent sensor nodes to observe physical conditions.WSN is deployed in unattended and unsecure environment. So an adversary simply captures sensor nodes and creates clone nodes by extracting key materials. These clone nodes are deployed in the network area.WSN must be either static or mobile. In static WSN centralized and distributed protocols are available to detect clone attack. In this paper we propose a new detecting method called NBCAD to detect clone attacks in static WSN. Here sensor nodes are clustered and a Cluster Head is allocated for each cluster. In our protocol public key cryptography is used to create a link between sensor nodes and cluster. After that each node requests a session key from their cluster head for secure communication. Each node collects the neighbor node location information and stores it in a separate table. With help of the neighbor table it computes the Finger Print of the node. All messages forwarded to the cluster head must include the Finger Print of the node. The Cluster Head compares it with the existing information and identifies the clone node. The proposed protocol has significant saving of memory space, communication overhead, and ideal resilience against node compromise and achieves higher probability of detection.