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中文摘要：
在无线传感器网络中单独基于节点身份认证的静态安全控制不能满足动态的安全需要,必须结合节点动态的行为可信确认才能更好地提供安全保障,因此基于行为可信的研究已经成为业界研究无线传感器网络的热点。在节点行为信任评估中,行为证据是行为评估的根本依据,但由于节点的行为是随机的,不确定的,因此能否获得证据也是随机的,不确定的,这就造成了节点行为证据不全、每次交往的行为价值不相等的现象,但目前在无线传感器网络的行为信任评估中很少考虑这个非常重要的现象。分析了节点交往中行为证据不全对信任评估带来的重要影响,论述了节点交往中证据不全与节点行为价值的关系,给出了不足填充法和权重扩展法等针对不同价值交往的节点信任评估策略。最后通过两个定理和两个性质证明了方法对节点行为信任评估的作用和性质,这为提高节点行为信任的价值可信度奠定了量化基础。
英文摘要：
In wireless sensor networks,single static identity-based node authentication can＇t meet the dynamic security needs.In order to provide better security we must combine dynamic behaviour-based node trust with static identity-based node authentication.In node behavior trust evaluation,behavior evidence is the fundamental basis of behavior eva-luation.Because the node＇s behavior is random,uncertain,which causes behavior evidence was not complete and behavior value is not equal in each interaction,but as far as we know,this very important phenomenon in behavior trust evaluation is rarely considerd.This paper analyzed incomplete behavior evidence obtained in node interaction brings about a significant impact on trust evaluation and discussed the relationship between incomplete behavior evidence and behavior value,gave a kind of behavior trust evaluation strategy for different values interaction such as Less-Filling and Weight-Extension.Finally,we used two theorems and two properties to prove strategy＇s effect and property in behavior trust evaluation.Paper lays the quantity foundation in enhancing value-trust reliability of node behavior trust.
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