Research On Security Of OSPF Routing Protocol With Digital Dignature Protection

Open Shortest Path First protocol, proposed by IETF (Internet Engineering Task Force), is link state routing protocol based on the shortest path first algorithm. It is an Interior Gateway Protocol and widely used in the network.The paper gives a detailed analysis on the internal operation mechanism of Open Shortest Path First routing protocol, the types of network, formats of protocol message, link state database and other related content, and also introduces the applications of digital signature technology. It also analyzes the three inherent security mechanisms of Open Shortest Path First Protocol, and puts forward the corresponding countermeasures for the existence of security risks. Routers in the network Update link state database through link state advertisement, so that the router can calculate the Routing Table according to the Link State Database. As for the various security problems of Link state advertisement, this paper, based on the analysis about the achievements of the previous study, provides the solutions for the security problems on the link state updating message of digital signature protection, which effectively reduces the consumption of hardware resources of Link State Advertisement protection from digital signature and brings better security for open shortest path first networks. And through the simulation system designed in this paper, the feasibility of this program gets verified and the analytic demonstration about the safety and efficiency is also presented.With the widely application of Open Shortest Path First Routing Protocol, the exploration of its safety can enhance network security and will win high immediate significance.