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中文摘要：
针对传感器网络不仅有更多的攻击方式，而且可以采用的防御手段也极为有限的问题，文章从安全协议的设计角度出发阐述了无线传感器网络存在的安全问题并有针对性地提出了解决方法。在详细分析SPINS协议安全特性的基础上指出了该协议尚存的安全问题，并对协议进行了有效的改进。
英文摘要：
There are many different kinds of attacks that aim at WSN. But few measures could be adopted to prevent these attacks due to WSNs nature. Accompanied with designing a secure protocol for WSN, some security issues and the corresponding resolvents are expatiated in this paper. At the same time, this paper analyzes the SPINS protocol in details, pointing out some existing security issues. Finally, this paper give some efficient improvements on the SPINS protocol.
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