Cluster based Certificate Authority Scheme in WSN

Security is a very important requirement in networks and wireless sensor network are no exception to this. During security attack, an attacker can inject an intruder node in the network which can alter the data being disseminated or modify the data item too. So towards overcoming this issue, security protocol called Didrip was developed for flat based network which allows for distributed data discovery and dissemination. Also this protocol would allow network owners and authorized users towards disseminating the data into Wireless sensor network without having to relay to the base station. But regarding clustering approach which is most efficient one regarding energy efficiency, there is a security vulnerability i.e., checking the cluster head for vulnerability to the network. There are two most vulnerable security issues which are not addressed in existing security protocol of WSN called DiDrip including the one mentioned. The above said problems for clustering approach in WSN are overcome with Cluster-based Certificate Authority Scheme(CA). We also use a digital signature to sign all the nodes present in the network. So if any node wants to initiate a communication, it should be signed by the base station. And if a node moves from one network to another, it can start a communication by using the same sign without having to exchange key which is expected to reduce end to end delay, overhead and so. This has been simulated using ns-2 simulator.