一种基于六边形部署模型的面向传感器网络的随机密钥预分配方案

Random key predistribution scheme for sensor networks based on hexagon deployment model

针对基本随机密钥预分配方案和基于部署信息的密钥管理方案中存在的不足,提出了一种基于六边形部署模型的面向传感器网络的随机密钥预分配方案。该方案更充分地利用了六边形部署模型的特点,通过将部署区域划分为六边形网格,并将传感器节点按其标志号进行分类,然后根据节点期望部署的网格位置和其节点类别进行相应的密钥预分配,从而有效改善了网络的安全性能。分析和仿真表明,在相同的存储开销下,本方案具有更高的安全连通率和更强的抗节点捕获攻击能力。

The basic random key predistribution scheme and most of existing key management scheme using deployment knowledge have a few of shortcomings,such as having difficulty in trading off between the security connectivity and the resi-lience against the node capture attacks and et al.In order to address these problems,this paper proposed a random key predistribution scheme for wireless sensor networks based on hexagon deployment model.The scheme utilized the characteristics of the hexagon deployment model sufficiently to better the networks＇ security and performance,which first dividing the deployment field into a number of non-overlapping hexagon grid cells,sequentially classified the sensor nodes into two kinds according to their identity numbers,and finally preloaded the every node with its individually relevant keys on the basis of its expected grid location as well as its node kind.Analysis and simulations show that the proposed scheme has the higher security connectivity and the stronger ability of resilience to the node capture attacks while expending the same storage spaces.