Secure Path Key Establishment Schemes Based on Random Key Management for WSN

A large number of the path key establishment schemes regard same probability of the node capture attack for each node in the wireless sensor networks. However, in certain critical applications this statement may not be right making such schemes less practical for many real-world applications like border surveillance and disaster management. In this paper, an attack matrix (AM) is designed to calculate the attack coefficient of the sensor nodes at the time of their positioning in the sensor field. The path key exposure problem is minimized by bypassing the nodes with greatest value of attack coefficient. Three attack-resistant path key establishment schemes are presented based on the AM namely attack-resistant proxy-based path key establishment, attack-resistant friend-based path key establishment and attack-resistant disjoint path key establishment. We find that the proposed schemes show improved performance compared to the existing path key establishment schemes. The resistance against node capture of proposed schemes has been verified based on the probability of key recovery and path compromise ratio. The result outcomes prove their expediency in diminishing node capture impact.