無線感測網路經常應用於軍事系統、監視系統，這些大都是散佈於無線、開放性的環境中，因此感測網路的安全機制相對的就非常重要。然而，目前已經有相當多在無線感測網路上做入侵偵測以及容錯系統的安全相關研究。但還很少研究是可偵測出在一個無線感測網路中，哪些是被俘虜的感測點，這部份在感測網路的安全性上，也將會是相當有貢獻的。此篇論文就提出了一個分散式跨層俘虜檢測模型，利用分散式的機制，也根據通訊協定中各個層的不同特性及其相關資訊來偵測哪些感測點已被俘虜。由於無線感測網路的某些特性，例如：低能量、低計算能力、低儲存能力等。因此，此篇論文的設計目標就朝著簡單、高效率且正確性高來進行。當我們能偵測得出被俘虜的感測點，也就能讓無線感測網路更加安全、更加實用。

Wireless　sensor　networks　(WSNs)　usually　are　applied　in　military　systems,　surveillance　systems,　etc.　Since　WSNs　always　are　deployed　in　open　environments,　the　security　mechanisms　in　WSNs　are　very　important.　Although　there　are　many　security　mechanisms　in　WSNs,　such　as　intrusion　detection　and　fault　tolerant　system,　few　of　them　are　proposed　to　detect　compromised　sensors.　In　this　paper,　we　propose　an　application-independent　compromise　detection　model,　distributed　cross-layer　compromise　detection　model　(DCCD),　making　use　of　a　distributed　mechanism　and　the　information　of　each　layer　in　the　communication　protocol　to　detect　which　sensors　were　already　compromised.　Due　to　the　characteristics　of　low　power,　low　computation　ability,　low　storage　space,　simplicity　and　high-efficiency　is　our　design　goal.　Only　when　compromised　sensors　can　be　detected,　the　WSNs　could　be　safer　in　practice.

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