一种基于蜂窝模型的无线传感器网络密钥分配方案

A Hexagon-Based Key Distribution Scheme for Wireless Sensor Networks

为了提高网络的安全连通性、可扩展性和降低存储开销,本文基于蜂窝模型,采用秘密绑定的思想,提出了一种有效的分组密钥分配方案。在该方案中,同一组的节点利用基于多项式的密钥预分配方法建立共享密钥,组间相邻节点借助HMAC函数绑定的秘密建立共享密钥。并将共享密钥的建立限制在网络部署之初,网络更新中共享密钥的建立则需要经过基站的确认。此外,通过分析子区域半径与各个参数的关系,找出了其最佳取值,实现了对蜂窝模型密钥管理方案的优化。

In order to improve the secure connectivity ＆ expansibility and decrease memory costs, an efficient hexagon-based grouping key pre-distribution scheme is put forward by using secret binding. In this scheme, the polynomial-based key pre-distribution scheme is used to generate pair-wise keys for the neighboring nodes in one group, and the binding secret generated by a HMAC is employed to establish the common key for the neighboring nodes in different groups. Furthermore, the process of establishing pair-wise key is limited in the beginning of the network deployment, and the pair-wise key establishment in the process of the network updating needs to be verified by the base-station. In addition, by analyzing the rela- tions among the radius of the cell, secure connectivity, memory costs and other parameters, the most appropriate value of the cell＇s radius is found, which can optimize the hexagon-based key pre-distrihution scheme.