Key Predistribution Scheme for Wireless Sensor Networks Based on Hierarchical Grid
Jing Chen · 2008
Providing a suitable key establishment scheme in wireless sensor networks is challenging due to all the characteristics of these networks,such as dynamically changing topology and limitations of power,computation capability and storage resources.Presented a key predistribution scheme based on hierarchical grid which is suitable for wireless sensor networks.Our scheme uses symmetric bivariate polynomial to generate a secure key for two sensor nodes.The distribution of the keying material was performed on a hierarchical grid.In our scheme different polynomials for different sections of the network to take the merit that compromising of(t+1)nodes will only affect the related polynomial zone,and thus,using different polynomials with different t degrees will lead to higher survivability against attacks.The proposed key predistribution scheme enhances the security of the wireless sensor network and only spends moderate computation cost,so it is quite practica1.