The Design Of Network Security Defense System

The thesis based on the author's practical work, it discussed the process of the design which was used in the network security defense system. At the first half part, the article discussed the two main steps at the earlier preparatory stage, the demand of the security and the risk analysis. Thus get the goal and the principle of the security design. At the last half part, it introduced the outline of the design and the key details of the security management.The main idea of the thesis was trying to unify the key elements which was considered in the concrete information system-including the network security, application security, technical security and the security of the operating management-into a whole outline of the design.