H-WSN with maximized QoS using secure data aggregation

To perform some operation there is a need of some amount of energy over the node is same to the sending the single bit of data in the network. Data transportation reduces the network lifetime when sending data in sensor network. So the need to reduce the energy consumption for improving the network lifetime. As cluster head is aggregator node of the cluster it can take part in communication many times while communication is going on in the cluster members. That's the reason that the energy utilization of the cluster head is high as compared with the cluster members present in the cluster. The present system has a way to choose the cluster head unplanned due to its high level of energy consumption. To answer this problem we introduced a system represents a technique in that effective cluster head is chosen based on the distance from the base station as well as remaining energy. After selecting the cluster head, it makes use of minor amount of energy of sensor network as well as helps to improve the lifetime of the network of sensor network. Aggregation of the data received from the cluster members is duty of cluster head in the cluster. Verification of data is done by the cluster head prior to the data aggregation if data received is not valid then received data is discarded. Only verified data is taken for aggregation at cluster head. Encryption is done by making use of homomorphic encryption method as well as encrypted information send to the cluster head and information decryption is performed by base station (BS) for giving end to end security. An ID based signature technique is developed for hop by hop authentication. In this paper, we present the method for recovering the data which is lost due to the buffer overflow. In given system cache memory is provided by the cluster head for recovery of data loss. At last test results shows depending on parameter like time as well as energy consumption on Jung simulator that system presented is good compared to the available system.