Research On Wireless Sensor Network Node Trust Model Based On Communication And Energy

In recent years,wireless sensor network(WSN)related technology has made great progress,it is widely used in military,medical,environmental and other fields.However,since sensor nodes are often deployed in an open environment and their resources are very limited.It is vulnerable to a variety of attacks,the network there is a great security risk,affecting the practical application of the network.Traditional encryption and identity authentication techniques can only solve external attacks.When the sensor node is subjected to an internal attack,it will fail.Trust management is considered to be an effective complement to the security of wireless sensor networks.Based on the characteristics of wireless sensor network and the characteristics of existing trust management mechanism,this paper proposes a wireless sensor network node trust model based on communication.Considering the uncertainty of trust and reputable nodes are overused,this paper presents a wireless sensor network node trust model based on communication and energy.It can guarantee the security performance of the network,but also extend the network life cycle.The main work of this paper is as follows:(1)Based on the characteristics of wireless sensor network,a wireless sensor network node trust model based on communication is proposed.The model calculates the communication trust value by Bayesian theory to judge whether the network node is reliable.In this paper,we first analyze the advantages and disadvantages of the basic Bayesian theory to evaluate the trust value,and then improve the shortcomings.In order to prevent non-invasive factors caused by abnormal network behavior,the introduction of abnormal discount factor.In order to reflect the sensitivity of trust to time,the introduction of adaptive forgetting factors to weaken the impact of past behavior.In order to prevent the malicious nodes of the slander,the introduction of deviation to filter some of the recommended nodes.The experimental results show that the proposed model has high detection rate and low false detection rate,and has good network security performance.(2)The Bayesian theory does not take into account the uncertainty of the trust and the reputable nodes are overused.In this paper,a wireless sensor network node trust model based on communication and energy is proposed.The model is divided into communication trust module and energy trust module.The communication trust module introduces the entropy-based risk assessment mechanism on the basis of(1).It can reflect the uncertainty of trust.The energy trust module models the residual energy of the node and calculates the energy trust value of the node.Finally,integrated communication trust and energy trust to evaluate the trust of nodes.The experimental results show that the model proposed in this paper has high detection rate and low false detection rate,and guarantees the network security performance while extending the life cycle of the network.