摘要： 无线传感器网络链路损耗大，密钥协商不能一次成功。为了研究无线传感器网络链路状况对密钥协商的影响，提出一个高区分度的评估指标——加权安全连通率，通过分析影响密钥协商的因素及对多个不同密度的网络进行密钥协商仿真，找出无线传感器网络链路状况对密钥协商的影响规律。仿真结果及分析表明，网络布置保持节点间距在最大通信距离的2/5左右，能使安全连通率较优。

关键词: 无线传感器网络, 密钥管理, 安全连接, 安全连通性, 加密

Abstract: Because of the higher loss rate of wireless sensor networks, key negotiation can not be completed only in once. A metric with higher discrimination, namely weighting secure connectivity, is proposed to research the influences of the link status of wireless sensor networks on key negotiation. By analyzing the factors of affecting key negotiation and simulating on various network models, the law of influences of link status on key negotiation is found. The simulation results and analysis show that the secure connectivity is better if the distance between nodes accounts for about two fifths of the longest communication distance.

Key words: Wireless Sensor Networks(WSN), key management, secure link, secure connectivity, encryption

中图分类号: 

• TP393