A Trust Evaluation Model for Wireless Sensor Networks

An effective dynamic trust evaluation model (DTEM) for wireless sensor networks can be used to complement traditional security mechanisms to address security issues. The performance (detection rate) of the DTEM was better than both RSFN and BTMS (these are 2 existing trust models). The traditional security mechanisms (cryptography, authentication, etc.) are widely used to deal with external attacks. A "trust model is a useful complement to the traditional security mechanism, which can solve insider or node misbehavior attacks" In this research paper, the authors highlight the relationship between four modules. Use figure 2 to better understand the progression of the implementation process. In your own words, write or redraw your own understanding of the trust process outlined in figure 1.

Abstract

Trust evaluation is an effective method to detect malicious nodes and ensure security in wireless sensor networks (WSNs). In this paper, an efficient dynamic trust evaluation model (DTEM) for WSNs is proposed, which implements accurate, efficient, and dynamic trust evaluation by dynamically adjusting the weights of direct trust and indirect trust and the parameters of the update mechanism. To achieve accurate trust evaluation, the direct trust is calculated considering multitrust including communication trust, data trust, and energy trust with the punishment factor and regulating function. The indirect trust is evaluated conditionally by the trusted recommendations from a third party. Moreover, the integrated trust is measured by assigning dynamic weights for direct trust and indirect trust and combining them. Finally, we propose an update mechanism by a sliding window based on induced ordered weighted averaging operator to enhance flexibility. We can dynamically adapt the parameters and the interactive history windows number according to the actual needs of the network to realize dynamic update of direct trust value. Simulation results indicate that the proposed dynamic trust model is an efficient dynamic and attack-resistant trust evaluation model. Compared with existing approaches, the proposed dynamic trust model performs better in defending multiple malicious attacks.

Source: Zhengwang Ye, https://www.hindawi.com/journals/js/2017/7864671/#abstract
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