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采用可再生散列(Hash)密钥链机制增强无线自组织(Ad hoc)网络中安全有效距离矢量路由SEAD协议的安全性.基于(t,n)门限方案,设计了一种新型的可再生Hash密钥链算法,每当发布当前链的一个Hash值,同时发布一个生成下一条Hash链所需要的子公钥;当Hash值发布t次以后,各验证节点能利用先前收集的各子公钥来验证新产生Hash链的链尾值数字签名的有效性,从而使得新链能正确使用,继续保障路由协议的可靠性.利用NS-2平台进行了仿真实验,并与赵源超等提出的2种Hash链可再生方案进行了性能比较.实验结果表明,所提方案具有更好的安全性,在cbr数据包发送率方面具有更高的成功率,并且在能效上也有一定改进.
The security of the SEAD protocol for secure and efficient distance vector routing in wireless ad hoc networks (Ad Hoc) is improved by using a hash key chain mechanism. Based on the (t, n) threshold scheme, a novel renewable Hash key chain algorithm, whenever a Hash value of the current chain is released and a public key needed to generate the next Hash chain is issued at the same time; when the hash value is released t times, each verification node can utilize each of the previously collected children Key to validate the validity of the digital signature of the chain-tail value of the newly generated Hash chain, so that the new chain can be used correctly and continue to ensure the reliability of the routing protocol.An experiment using NS-2 platform is carried out, The performance comparison of Hash chain renewable scheme shows that the proposed scheme has better security, higher success rate in cbr data packet sending rate, and some improvements in energy efficiency.