Abstract
Wireless sensor network is a key technology in Internet of Things. However, due to the large number of sensor nodes and limited security capability, aging nodes and malicious nodes increase. In order to detect the untrusted nodes in the network quickly and effectively and ensure the reliable operation of the network, this paper proposes a dynamic network security mechanism. Firstly, the direct trust value of the node is established based on its behavior in the regional information interaction. Then, the comprehensive trust value is calculated according to the trust recommendation value and energy evaluation value of other high-trust nodes. Finally, node reliability and management nodes are updated periodically. Malicious nodes are detected and isolated according to the credibility to ensure the dynamic, safe, and reliable operation of the network. Simulation results and analysis show that the node trust value calculated by this mechanism can reflect its credibility truly and accurately. In terms of reliable network operation, the mechanism can effectively detect malicious nodes, with higher detection rate, avoid the risk of malicious nodes as management nodes, reduce the energy consumption of nodes, and also play a defensive role in DOS attacks in wireless sensor networks.
Highlights
Internet of Things (IoT) can be regarded as the third information technology revolution following the computer and the Internet [1, 2]
Wireless Sensor Network (WSN), as a key technology in IoT, is a network system composed of microsensor nodes through wireless communication, and it is an important source of sensing data in IoT
This paper proposes a dynamic adaptive security mechanism suitable for WSNs based on trust management
Summary
Internet of Things (IoT) can be regarded as the third information technology revolution following the computer and the Internet [1, 2]. Its development and application will have far-reaching impact on various fields, so it is very essential to ensure the safe and reliable operation of WSNs. While WSNs play a huge role in IoT, the security problems are even more severe due to the characteristics of the sensor network itself [6,7,8,9]. It has important significance to research into security mechanisms of WSNs. On account of the existing problems in WSNs, this paper puts forward a dynamic network security mechanism based on trust management. On account of the existing problems in WSNs, this paper puts forward a dynamic network security mechanism based on trust management This mechanism is based on trusted networking and takes trust computing as the core.
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