A Survey on Energy Efficient Secure Data Aggregation in WSNs

Wireless Sensor Networks (WSNs) are special kind of ad-hoc networks, having abilities of sensing, processing and wireless connectivity contains hundreds or thousands of sensor nodes. Sensor nodes are usually constrained in energy, communication, storage, and computation capability. Due to the main characteristics of resource-constrained and battery-powered sensors in wireless sensor networks, energy consumption is always a major concern. WSNs usually generate large amounts of raw data in which there exists high redundancy. So, it is important to develop efficient data processing technique to reduce redundant data and the amount of transmission. Aggregation is an essential technique to reduce data redundancy and the communication overhead, also minimize the energy consumption and prolong network lifetime. Security is an important criterion to be considered because wireless sensor nodes are deployed in a remote or hostile environment area that is prone to attacks easily. So data aggregation and security are essential for WSN. In this paper we discuss the data aggregation approaches and advantages and disadvantages of data aggregation and secure data aggregation mechanisms in the network.