There are five major elements of network security:
1. Confidentiality
The characteristic that information is not disclosed to, or made available to, unauthorized users, entities or processes.
2. Integrity
The characteristic that data cannot be changed without authorization. That is, the information is stored or transmitted in the process of maintaining the characteristics of not being modified, not destroyed and lost.
3, availability
Can be accessed by authorized entities and used on demand. That is, when the need to be able to access the required information. For example, denial of service in a network environment, disruption of the normal operation of the network and related systems are attacks on availability;
4, controllability
The ability to control the dissemination of information and its content.
5, reviewable
Security issues arise to provide the basis and means
Network security refers to the network system hardware, software, and data in the system is protected from accidental or malicious reasons and suffered damage, alteration, leakage, the system continues to operate reliably and normally, and the network service is not interrupted.
With the rapid development of computer technology, the business processed on the computer is also based on a single mathematical calculations, document processing, based on a simple connection to the internal network of internal business processing, office automation, etc. to the development of a complex intranet (Intranet), corporate extranet (Extranet), the global Internet (Internet) based on the enterprise-level computer processing systems and worldwide information **** enjoyment and business processing.
In the system processing capacity to improve at the same time, the system's connectivity is also improving. However, in the connection ability information, circulation ability to improve at the same time, based on the network connection of the security problem is also increasingly prominent, the overall network security is mainly manifested in the following aspects:
1, the physical security of the network;
2, the network topology security;
3, the network system security;
4, the security of the application system;
5 , the security of network management, etc.
Extended information:
Network security is different due to different environments and applications. types. There are four main types:
1. System security
Operational system security is to ensure the security of the information processing and transmission system. It focuses on ensuring the normal operation of the system. Avoid because of the collapse of the system and damage to the system storage, processing and transmission of information caused by damage and loss. Avoid information leakage due to electromagnetic leakage and interference with others or interference by others.
2, network security
The security of system information on the network. Including user password authentication, user access rights control, data access rights, mode control, security audit. Security issues with the tread. Computer virus prevention and control, data encryption and so on.
3, information dissemination security
Information dissemination security on the network, that is, the security of the consequences of information dissemination, including information filtering. It focuses on preventing and controlling the consequences of the dissemination of illegal and harmful information, and avoiding the loss of control of the information on the public network Daeyun Free Han.
4, information content security
Information content security on the network. It focuses on protecting the confidentiality, authenticity and integrity of information. Avoid attackers to use the system's security loopholes for eavesdropping, impersonation, fraud and other detrimental to the legitimate user's behavior. Its essence is to protect the interests and privacy of users.
Baidu Encyclopedia - Network Security