Secure Data Aggregation Protocols in Wireless Sensor Networks: A Review

Wireless sensor network is a collection of large number of low cost resource constraint sensor nodes that communicates using wireless medium. Sensor nodes are resource constrained in memory, sensing, communication capability, and battery power. Data communication between nodes consumes a large portion of the total energy consumption of the WSNs. One of the solutions to reduce number of bits transmitted during communication is data aggregation. As wireless sensor networks are usually deployed in remote and hostile environments to transmit sensitive information, sensor nodes are prone to attacks. Thus, security is an important criterion to be considered in WSNs. Many secure data aggregation protocols have been proposed in wireless sensor networks. In this paper, many existing secure data aggregation protocols have been reviewed with their corresponding brief explanation. KeywordsWireless Sensor Network, Data Aggregation, Secure Data Aggregation, WSN, Security.