The Research On The Security Of Information System At Internet/Intranet

In the recently, the development of the communication network technology and computer technology make the economic activity is became electronically and networking. By the communication of Internet, any people can create his identification, can propaganda his product and service, to do the trade and accounting online at the same time. If you want to do some e-commerce activity, the security is the precondition you should think about at first.In this article, we will list the threaten on the network, then we analyze the network structure, to state the five layer network security model, we study how to use firewall, encryption to build the fort. We will introduce how to protect the LAN, WAN In the view of network building and system application, introduce how to create a safety e-commerce system. We introduction the technology and the product--how to keep away virus, hacker, internal attack. Information security is involved by many subject such as law design, design technique, management, use etc.