Dynamic Network Security Mechanism Based on Trust Management in Wireless Sensor Networks

Wireless sensor network is a key technology in Internet of Things. However, due to the large number nodes and limited security capability, aging malicious increase. In order detect untrusted quickly effectively ensure reliable operation network, this paper proposes dynamic mechanism. Firstly, direct trust value node established based on its behavior regional information interaction. Then, comprehensive calculated according recommendation energy evaluation other high-trust nodes. Finally, reliability management are updated periodically. Malicious detected isolated credibility dynamic, safe, network. Simulation results analysis show that by mechanism can reflect truly accurately. terms operation, nodes, with higher detection rate, avoid risk as reduce consumption also play defensive role DOS attacks wireless networks.