基于密钥池的簇状传感器网络动态密钥分配协议

为了解决簇状传感器网络中的密钥分配问题，在分析传感器网络的基本密钥预分配机制的基础上，提出了基于密钥池的簇状网络动态密钥分配协议．在保证网络连通率相同的情况下，该协议与基本机制最大的区别在于，网络节点能逐层从基站随机选取不同大小的密钥环．动态分配协议经过初始化、密钥建立和路径密钥建立3个阶段，使整个传感器网络形成一个由安全链路构成的连通图，而簇内同层节点以及相邻层间节点可以通过安全链路进行通信，协同完成应用任务．通过分析和实验证明，所提协议可有效节省存储空间达50%以上，并能显著提高网络抵御攻击的能力．

Dynamic Keys Distribution Protocol Based on Key-Pool in Clustered Sensor Networks

For solving the issue of key distribution in the clustered sensor networks, a dynamic key distribution protocol based on key-pool was proposed on the basis of the analysis of the basic key pre-distribution mechanism that is quite different from the proposed protocol, in which the sensor nodes in the network select their key rings of different size randomly from the base station layer by layer while ensuring the connection rate of the network the same. The dynamic distribution protocol was carried out through three phases of initialization, key-setup and path key-setup; making the entire sensor network to form a connectivity graph by safety links, and the nodes in the same layer within a cluster and the nodes in the adjacent layer can communicate each other through safety links to fulfill cooperatively the application task. The experiment shows that the proposed protocol can effectively save more than 50 percent of memory space and evidently increases the ability against attacks.