ESMART: Energy-Efficient Slice-Mix-Aggregate for Wireless Sensor Network

Wireless sensor network consists of a large number of resource-constrained sensor nodes and is usually deployed in unattended area to collect specific information. Energy consumption is always a major concern in the research field of wireless sensor network. Thus, data aggregation schemes emerged and were deployed for prolonging network lifetime by reducing data transmitted within the network. Meanwhile, along with the wide application of the data aggregation schemes, the security issues of data aggregation have been increasingly drawing attention and the designing of secure data aggregation scheme is becoming a hot spot. In this paper, we proposed an energy-efficient secure data aggregation scheme, ESMART: energy-efficient slice-mix-aggregate based on the technique of data slicing and mixing. The proposed scheme performs secure data aggregation in a more efficient way while keeping a good performance of privacy preservation. And the simulation result shows that the security performance of ESMART scheme is better than that of some existing and widely used schemes. 1. Introduction A wireless sensor network is composed of a large number of resource-constrained sensor nodes. The base station of the network sends queries to the child nodes, and the sensor nodes that received the queries will collect the information following the request of the query. The data acquired by sensor nodes will be transmitted to the base station with multihop transmission scheme. Obviously, the energy consumption of transmission will affect the life cycle of the sensor nodes dramatically. Hence, the technology of data aggregation has been widely used in wireless sensor network as an effective mechanism to reduce the amount of data transfer in the network. In the mechanism of data aggregation, the nodes which aggregate raw data from their neighbor nodes and process it by specific algorithms are called aggregators, and the other sensor nodes which center on the aggregators and only perform information collecting and transmitting are called leaf nodes. The processed and aggregated data will be returned to the base station through the aggregation tree constructed dynamically. After the application of data aggregation technology, the amount of data transfer in WSNs has been reduced greatly and then prolonged the operating life of the network. Meanwhile, some security problems have arisen because of the deployment of data aggregation scheme. As mentioned above, sensor nodes are usually resource constrained, the computing and communicating capacity of the nodes are very limited which