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广播认证是无线传感器网络中的一项重要安全服务,它能够使众多传感器节点对消息发送者的身份进行验证.本文针对多级μTESLA无线传感器广播认证协议易受拒绝服务(DOS)攻击及错误恢复时延长的缺点,提出一种新的多级μTESLA协议.协议通过使用底层密钥链认证参数包,减轻DOS攻击问题;通过使用高层密钥产生同一时间段的底层密钥链,缩短了错误恢复时延,并采用动态增加参数包缓存的方式,提高了错误恢复成功率.仿真结果表明在相同拒绝服务攻击条件下,本协议的参数包/数据包认证成功率、通信开销及错误恢复时延性能优于多级μTESLA协议及Tree-based协议,且不易受信道丢包率的影响.
Broadcast authentication is an important security service in wireless sensor network, which can make many sensor nodes verify the sender’s identity.This paper aims at the multi-level μTESLA wireless sensor broadcast authentication protocol susceptible to DOS attacks and error recovery Time delay, a new multi-level μTESLA protocol is proposed.The protocol reduces the DOS attack by using the underlying key chain authentication parameter package, which can shorten the error recovery by using the high-level key to generate the underlying keychain in the same period of time Time delay and increase the error recovery success rate by dynamically increasing the parameter packet cache.The simulation results show that the parameter packet / packet authentication success rate, communication overhead and error recovery delay of this protocol under the same denial of service attack condition Performance is superior to multi-level μTESLA protocol and Tree-based protocol, and less susceptible to channel loss rate.