基于数字水印的无线传感器网络数据安全融合方案

Data Identity Authentication for Wireless Sensor Networks Based on Digital Watermark

针对无线传感器网络中数据的安全问题,提出了一种基于数字水印的无线传感器网络数据安全融合方案。构建数据融合树将节点分层;叶节点采集数据后加密并向上层节点转发,每个中间节点接收到子节点的数据包之后先判断来源,然后验证数字水印以判断数据的正确性并进行数据融合处理,再将结果继续转发给上层节点,以此类推,直到基站收到数据结果。分析表明,此数字水印算法能够有效防止传感器数据被窃听,还能检测出数据在传输过程中是否被篡改。根据仿真结果,数据融合算法与其他算法相比,降低了单个节点传输数据的能量消耗,从而降低了整个网络的能量消耗,一定程度上延长了网络的生命周期,有一定的实用价值。

For the data security issue in wireless sensor networks, this paper proposes a secure aggregation scheme based on the digital watermarking technique. We build a data fusion tree and put sensor nodes hierarchical distribution. The leaf nodes collect data and send them to the upper nodes after encrypting the data. Every intermediate node can judge the data source after receiving the packet from the children node and this can check the correctness of the data and aggregate the data. This process will be continued until the base station receives data. The analysis shows that the proposed scheme can effectively prevent the sensor data from being intercepted, and detect precisely whether the data have been tampered. Compared with other digital watermarking method, the proposed algorithm can reduce energy consumption of the individual sensor nodes and extend the life cycle of the network to a certain extent.