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地理位置路由中基于信任的安全模型

Keywords: 无线传感器网络,地理位置路由,信任,Dirichlet分布,攻击,防御

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Abstract:

针对无线传感器网络中地理位置路由易于受到的虚假路由信息、选择性转发、女巫等多重安全威胁,提出一种基于信任的多重攻击防御安全模型.考虑传感器节点资源受限的特性,通过一定时间内数据报的确认信息代替耗能的监听机制,使用Dirichlet分布函数计算路径上邻居节点的可靠性,并结合地理位置路由中的代价作出路由选择.同时,初始信任被动态决定,按照信任值划分服务等级以限制恶意节点的请求.仿真结果及分析表明,在多重攻击下该模型比已有模型在成功转发率、网络生命周期方面有较大的提高.

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