由於無線感測網路使用無線傳輸，資料容易遭到竊聽、竄改，而感測網路節點受硬體的限制，無法使用複雜的加密技術。因此目前對於無線感測網路之金鑰管理的研究上，主要都集中在對稱式金鑰，因為有較低的計算複雜度，但卻使得感測網路的連結性(Connectivity)、可延展性(Scalability)受到限制。
本研究基於橢圓曲線加密(Elliptic Curve Cryptography, ECC)的金鑰管理機制，對於感測節點身分和訊息傳輸提供認證服務，使用憑證檢驗實體身分，在叢集式無線感測網路上防禦多重攻擊，並分析整體網路的安全性。

The data of wireless sensor networks are liable to eavesdropping and tampering due to wireless transmission, but complicated encryption technologies can not be used for prevention due to the hardware limitation of sensor nodes. Therefore, the researches of key management in wireless sensor network mainly focus on symmetric-key encryption by considering its lower computational complexity, in spite of its limited connectivity and scalability.
This study proposed a key management mechanism based on elliptic curve cryptography (ECC) to provide certification services for sensor nodes’ identity and message. The mechanism can be use to test physical identity for the defense of multiple attacks in cluster-based wireless sensor network. Analysis of network security is conducted by examples using this mechanism.

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