摘要：Data aggregation technology can effectively save network energy resource and storage resource so it is extensively applied in wireless sensor network. However, data aggregation technology also brings security problems and it demands that corresponding security schemes should be taken for precaution. Based on the requirement of the data aggregation security on WSN, combined with the features of sensor network, current data aggregation security schemes are analyzed. The defects of SIA scheme are pointed that it cannot provide data aggregation results with effective message authentication code. So an improved scheme based data integrity for data aggregation security in WSN is presented. First, the improved scheme inherits the idea of SIA, in data filtering and cross-layer verification; Second, it expands the adaptability of SIA protocol from a single-path data filtering protocol to a complete data aggregation security scheme. Meanwhile, improved scheme supports that intermediate nodes can execute data aggregation operation to effectively reduce the transmitting overhead. It is also adaptive for more data aggregation operations, which shows better performance in saving storage resource and energy resource
