The Study Of Electronic Government Information Security Policy

System security follow the "cask principle ",that is to say a cask's volume decide on the shortest wood plate that consists the cask. Therefore, the system security of a large distributed information system like electronic government must be establish on a holistic multi-tier security architectural,Avoid omitted weak link result in entire secure architectural collapse .In the paper, we analysis security character of the electronic government first of all, and generalized major secure threaten of electronic government, I.E. Virus, Hacker attack etc .System security is a key technology to the development and deployment of IT applications and services in a growing global network. Security is critical at various levels of the system. However, security solutions typically address a very specific vulnerability with little relation to the larger picture of secure information systems. Organizations have successfully implemented these solutions without knowing if all security requirements have been met or what impact these solutions have on other parts of the information system. The focus of this paper will be to identify the various layers that exist in large distributed systems, and to lay the groundwork for defining security requirements for each layer allowing for a mapping of security implications that each layer has on other layers. This will result in the design of a layered security architecture which could assist organisations in mapping out all required or successfully implemented security requirements at various levels of information systems.