Vulnerability Evaluation of Multimedia Subsystem Based on Complex Network

IP multimedia subsystems bring huge security threats to the IMS-based next-generation networks although they bring IMS-based network integration and business ability enhancement. Therefore, the research on the vulnerability of IP multimedia subsystems attracts widespread attention recently. In this article, the security threats of next-generation core networks are discussed first. And then we analyze the vulnerability characteristics of IP multimedia subsystems. In order to evaluate the vulnerability of IP multimedia subsystems effectively, this paper further applies the complex network theory to construct the network model of IP multimedia subsystem and propose the vulnerability assessment indicator by adopting entropy model. Finally, some simulation experiments and result analysis are provided to our evaluation model. Both theoretical analysis and numerical simulations indicate that the proposed vulnerability measurement is a simple and effective new method to evaluate the overall vulnerability of this kind of IP multimedia subsystems. In addition, the proposed method provides a new idea and scientific basis for the vulnerability assessment of IP multimedia subsystems.