分析了无线传感器网络面临的安全威胁、需要解决的关键安全问题及安全协议设计原则。

Security is a challenge in wireless sensor networks. The potential security threats, the key issues and design principles for achieving the security of wireless sensor network are analyzed.

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针对目前安全协议的设计方法存在方法抽象、适用范围小及复杂的特点，提出了一种新的安全协议设计方法。

Since the present design methods for security protocol are characterized by being abstract, narrow application range and complexity, this paper presented a new approach to design security protocol.

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在实用安全协议设计方面，现有的应用安全协议还存在着可改进的空间，解决从应用中抽象出来的新问题，需要设计新的安全协议。

To deal with new problems abstracted from applications, new secure protocols need to be designed. Based on the above discussions, this thesis covers the following topics:1.

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