Abstract: To address the problems with software defined network, such as the inevitable loopholes in the forwarding equipment and the lack of mechanisms for the controller to actively check network behaviors, a trusted transmission scheme of the SDN based on path tracking feedback is proposed. A transmission path trust verification mechanism based on tracking feedback is proposed in the scheme. Based on the feedback information, the credibility of the node is analyzed and the credibility of the path is evaluated. At the same time, a disjoint multi-path trusted routing algorithm DMTRA-PTF based on path tracking feedback is proposed to avoid malicious switch nodes through path tracking feedback and trusted evaluation, so as to construct disjoint multipath routing scheme to enhance the reliability of SDN transmission service. The experimental results show that the path tracking feedback mechanism can accurately identify the malicious switch with a small performance cost, and the trusted routing algorithm proposed in this paper can dynamically plan disjoint multiple trusted paths for subsequent routes, which can effectively improve the credibility of the whole network.

Key words: path tracking feedback, software defined network, trustworthiness analysis, multipath; , trusted transmission