Survey on Secure Data Aggregation using Clustering Methods in WSN

Wireless Sensor Network is a group of specialized transducers with communication infrastructure for monitoring and recording conditions at diverse locations..It is constrained in terms of computation, communication,memoryand energy due to node failure, limited scalability and low battery power. Data aggregation is used to reduce communication overhead and energy expenditure in(WSNs). Data aggregation is a process of aggregating the sensor data using aggregation approaches. But the Data Aggregation techniques are prone to link and node failure, significant variation in readings and time consuming. In this survey, the cluster based data aggregation methods are discussed which overcome the issues in convectional data aggregation approaches. In clustering technique, a Cluster Head (CH) is selected which collects data from other sensor nodes in that cluster and forward aggregated data to the base station. Since cluster head is responsible for the aggregated data it is highly prone to malicious attacks. Therefore, different security frameworks which ensure data confidentiality and data integrity have also been surveyed