資料集成是無線感測網路中的一項重要技術。此技術能減少無線傳輸並節省電力消耗，而電力消耗是無線感測網路中的重要問題。然而資料集成也為攻擊者開啟了一道門戶。受攻擊的集成點可偽造自許多感測器資料所計算出的集成結果，並且使最終的計算結果大幅偏差。此種攻擊方式無法利用資料加密的方式防止，而過去的資料集成協定也難以偵測。這篇論文提出一個新方式以保護資料集成。此種方式在感測網路中建立感測器集團，並利用此架構監測訊息以偵測攻擊行為。模擬結果顯示，此種新方式能夠花費相對較少的額外能量偵測到受攻擊的集成點。

Data aggregation is an important technology in sensor networks because it reduces the amount of radio transmission and saves energy, which is a critical
problem in sensor networks. However, data aggregation opens a door to attackers of sensor networks. A compromised aggregator can forge a fake aggregation result standing for a lot of sensor nodes and deviate the final result greatly. Such kind of attacks can not be prevented by data encryption, and are difficult to detect by aggregation protocols before. This thesis proposed a new method to protect data from the attackers. This method constructs cliques over the sensor networks, and uses this structure to monitor messages and detect abnormalities. Simulation results show that this method detect compromised aggregator with relatively small overhead.

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