Network security includes network communication security, information in network transmission, confidentiality and integrity in network transmission, controls access to restricted domains and sensitive information, and uses hidden communications on public networks such as Internet. In order to solve these problems, major organizations and technology suppliers have launched various networks and information security technologies. Its technical summary is as follows:
AAA: Authorization, certification, and billing is a technique for providing network resources access intelligence control, execution policies, audits, and necessary service information fees. Authentication provides a way to identify users, that is, before allow access, the user needs to provide a valid username and valid password. Authorization processing mainly determines whether the user has access to specific information or some access to some network domains. The billing is calculated to calculate the user's consumption network resources, including system time or the number of users transmitted in a session, which can be used for authorization control, billing, trend analysis, resource utilization, and capacity plan. A special AAA server or program that performs these features can usually provide: authorization, authentication, and billing services.
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