Physical Isolation In The E-government Network Information Exchange Technology Research,

Along with the improvement of our country's infrastructure and applications, the problem in the security of network and information is standing out increasingly. Authority has demanded clearly on the network security of some organizations involved in confidentiality. For instance, as the security of government's working network, the rule is, "The computer system involved in country confidential can not be connected to Internet or other public network directly or indirectly. It must be physical isolation." However, many government services must get information via Internet. Therefore, to exchange information between Internet and Intranet is the key problem of the organizations, such as government.To solve the problem, this paper presents a system named EGDT, which is composed by hardware system and software system. Base on the requirement of security, the system realizes the exchange of information. The paper has put EGDT into product. And EGDT has been certificated by some authorities concerned.Firstly, this paper works over the realizations of physical isolation and introduces the background and field to apply for of information-exchange system. Secondly, this paper defines the concept view and logical view of system. Then, paper evaluates the security of EGDT. Finally, this paper discusses the system from two aspects as following.1. Design of physical isolation system. In this part, this paper presents a system which is secure, reliable and effective.2. Design of application system to exchange data. Base on the physical isolation system mentioned above, this paper discusses the method to exchange information which e-government affairs need and guarantees their security and confidentiality.