LAUSR

Security of Wireless Sensor Node (WSN) is an important issue due to inherited nature and uncontrolled operation, which makes it vulnerable to many attacks Sybil attacks, denial of service attacks, etc. The main issue related to WSN is the key management system, as it plays an important role in providing security services for WSNs. However, developing a distribution/establishment scheme for WSNs is challenging due to limited sensor sources. In this study, three schemes namely proxy-based path key establishment (PPK), friend-based path key establishment (FPK) and disjoint path key establishment (DPK) are developed. The main problem of path key explore is minimized by passing the nodes with high value of attack coefficient. In PPK model, the Grey-Wolf Optimization (GWO) is used to optimize the threshold value for k-key fragment number and categorization of nodes. The nodes having the common key with destinations are identified by FPK and the best path to reach the destinations is selected by DPK. According to the path compromise ratio and probability of key recovery, the resistance to the effectiveness of three proposed schemes are verified. The results proved that the proposed PPK-GWO achieved probability of key recovery 0.8 for 100 captured nodes, where the DPK achieved the probability of path compromise 0.95 for 10 captured nodes.