Date Added: Aug 2010
In this paper, Wireless sensor networks place sensors into an area to get data and send them back to a base station. Data fusion, in which collected data are fused before they are sent to the base station, is usually implemented over the network. Since, a sensor is typically placed in locations that are accessible to malicious attackers, information assurance of the data fusion process is very important. A WB (Witness-Based) approach has been proposed to verify the fusion data. In this approach, the base station receives the fusion data and "Votes" on the data from a randomly chosen sensor node. The vote comes from other sensor nodes, called "Witnesses," to confirm the correctness of the fusion data.