Science and Development Network (SciDev.Net)
Data aggregation techniques are useful means in order to reduce number of data transmissions and improve the bandwidth and energy utilization in Wireless Sensor Networks (WSNs). The simplest way to achieve distributed data aggregation is to select data aggregator nodes. However, if captured by an intruder, aggregator node can be a subject to several attacks, such as eavesdropping, jamming, message dropping, message fabrication, and so on. This paper discusses security issues of data aggregation in WSNS and describes existing solutions and their limitations.