The Study Of Asset Assessment Of IMS-Based Next Generation Network

With the development of the next generation network, there is a continued surge in the number of the protocols and in the type of services and equipment. The network environment is becoming increasingly complex and insecure, which causes a series of security issues in the IMS based next generation network. In order to avoid the occurrence of security incidents, risk assessment on the network is of important significance. Asset assessment is the basis of risk assessment in this link. Recently, the research of asset assessment for the risk assessment process in information system has already begun to achieve initial success both at home and abroad, but in the field of the risk assessment of the next generation network, it is still blank.This article analyzes the processes and methods of asset assessment of risk assessment in the traditional information security system, and summarizes the current status of the research. Then according to the features of IMS based next generation-network, the author summed up a set of specific processes for asset assessment and a series of optional methods to implement these various processes. This paper focuses on the most difficult and important problems of the asset assessment of the IMS based next generation network, and gives an in-depth study. According to the characteristics of IMS network, it lists many operational methods for the asset identification and asset classification, and proposes the corresponding asset-value-calculation method based on the mathematical model. The method is consisted mainly of qualitative analysis and inaccurate asset evaluation process originally. But now it is optimized into a combination of qualitative method and quantitative method, mainly on quantitative calculation method. The paper also gives a specific example of IMS network and put the above specific processes and methods into application during the process of asset assessment, which make it clearer and more intuitive on how to use the above method into the asset assessment in the actual IMS network. In the end, it gives a design of an asset assessment system of IMS network, which is a subsystem of security risk assessment system for IMS network. It completes the function of asset evaluation, asset management, as well as asset storage and asset demonstration.