Abstract: Aiming at the shortcomings of the current official department website security, based on computer network and information filtering to study Web portal, combined with the Internet and the actual use situation of office business department, this paper builds a monitor information of Web portals. By using information elements model, the system prevents sensitive information leak from website. The system is based on the general development framework and MFC libraries, and the test results verify the effectiveness and high efficiency.

Key words: sensitive information, information filtering, information elements, development framework