一种高连通率的传感器网络密钥预分配方法

A high connectivity rate key pre-distribution scheme in sensor network

密钥管理是无线传感器网络安全的基础,其中密钥预分配是可行性比较高的密钥管理方法,节点之间的共享密钥的概率一直是密钥预分配中比较重要的性能指标,可是现有的无线传感器网络密钥预分配方案大多存在节点间密钥共享概率低或者共享概率不稳定的问题.结合Blom对称多项式,通过改进TD方法,提出了一种改进的密钥预分配方法,该方法能够实现稳定的节点间高密钥共享概率,从而保证了无线传感器网络的安全连通,此外该方法还具有灵活易变的特性,可以改变传感器分组数目以及传感器存储的密钥个数,满足实际需求.

Key management is the base of wireless sensor network security, key pre-distribution（KPS） is a high feasibility method in key management, the probability of sharing key between the nodes is always the important property in KPS, however, most of the existing wireless sensor network key distribution schemes have the problem of low probability of sharing keys between nodes , or the probability of sharing keys between nodes is not stable. With blom symmetric polynomials, by improving TD scheme, proposed a improved key pre-distribution scheme, this method could achieve a stable high-key sharing probability between nodes. Thus ensuring the security of wireless sensor network connectivity, in addition, the method also had the characteristics of a flexible variable, it could change the number of sensors and sensor storage group key number to meet the actual demand