Research on Lightweight Secure Routing Technology based on Satellite Network

To address the problem of lack of secure routing mechanism in satellite networks and the vulnerability of internal malicious nodes to packet loss during data transmission, this paper proposes CAODV (Credible Ad hoc On-Demand Distance Vector), a trusted value secure routing protocol based on the fusion of trust evaluation and load balancing mechanisms in the context of satellite networks. (Routing). First, the network history of the node's behavior is quantified into a trust value, then all the node's neighbors sum up their trust value and take the average, and finally the comprehensive trust value of each node is uploaded to the management center, so as to directly select safe and trustworthy nodes during route seeking, and eliminate malicious nodes from the source; in addition, to avoid the high trust value of the path workload is too large and lead to circuit breakage, or other links. In the case of “starvation”, a load balancing mechanism is introduced to combine the trust value to select the reliable and low load path transmission. The experimental results show that, compared with AODV and EASR, CAODV has higher malicious node identification capability, can effectively defend against black hole attacks, can effectively reduce packet loss rate, and improve network throughput and survival cycle.