A Security Test Message Generation Algorithm of Diameter Protocol in the IMS Network

In order to find out the network security problem of the IP Multimedia Subsystem (IMS) in Diameter protocol, first of all, this paper builds a security test model of classification entity according to different entities in IMS network. Then owing to the fact that test messages are difficult to pass the protocol specification, we present a limited distance method for generating test message based on equivalence class partition, which abstracts each Diameter signal massage to the point in the multidimensional space. We calculate Euclidean distance D(X, Y) between the test messages and standard message and then allow test messages to pass protocol specification by limiting D(X, Y) in certain extent. In the monitoring content and method, we propose information disclosure as the core of the monitoring methods according to the Diameter protocol security requirements, we set the IMS network verification environment, and then demonstrate the rationality of the model and effectiveness of massage generation method.