Research Of Information Security Assurance In The Taxation System

Generally speaking, the system of our country's tax affairs is a huge complex great one, which has the distinguished by state tax and local tax for the special operation and distinguished for four levels that are the state-level, the provincial -level, the city-level and the town-level. The extremely complicacy of the Taxation organization also depends on the a number of the network points, countless network equipments and exports, a great variety of operating system types, and the all kinds of application systems, facing the great system with witch, the security hidden dangers have been seen everywhere and the whole system has been influenced by its security problems more and more with the development of information technology. Through constant research and exploration, people have accumulated a great deal of method and experience for solving the information infrastructure and forming a whole set of security method of tax information systems, and at the same time with development constantly relevant security framework is being still improved,which could depress security hidden dangers and risks of the Taxation and make the system working in normal and stable operating state. The purpose of this paper is to study the relevant problem pertain to information security assurance problem of the tax information system. The first chapter gives a simple summarize of background and development of the tax information system, which the concepts and approaches relating to information security among the course. Chapter 2 expounds the content of system security from the time and space property. In time, information security represents the characters of which the system information has different state and the life cycle of generation of the information infrastructure. Different key of security policy depends on different phase of life cycle of generations. In space, system information security demonstrates the property of the information infrastructure that layered in vertical and distributed in horizontal, which discussed the problem if the security policy is sure to satisfy maturity, consistency and validity with which used the measure of security region. Chapter 3 studies the security theoretical model of Taxation's information security, which has three axis containing information states, factors of security assurance and time, and among which describes the relation for the Taxation information assurance. At the same time, it also builds a technology framework of security assurance relevantly. Chapter 4 analysis some relevant factors which influence the security risk of Taxation and uses evaluation method based on SSE-CMM model, confirms risk states of system and the relevant measure, and grasps the system information security condition comprehensively. The signification of this paper is that: it has summarized the information security characteristic and the explanation and of Taxation on the time and space, formalized a generalized security abstract model, performed an analysis and a study for the risk's evaluation which is the key point of system security.