To Continue Moving Forward Wlan Network Security Technology-wlan, Network Security, Wireless

As the WLAN market booming, its security issues have become more prominent as the orderly development of WLAN market, one of the major bottlenecks. International standard Organization This has made technical recommendations related to, but the controversy caused by the industry. China in the WLAN security research more quickly, before the AQSIQ and the State Standardization Administration jointly issued a document, determine our own R & D WAPI WLAN technology, mandatory safety standards.

So, to achieve the WLAN security, in the end what technology does it mean? By definition, the main Package Including spread spectrum, frequency hopping wireless technology itself is difficult to capture the listener to steal valuable data; set strict user password and authentication measures to prevent unauthorized users invading; set additional third-party data encryption scheme, even if the signal is also stolen listen difficult to understand the contents; take Network Isolation and network authentication measures.

? Spread spectrum technology. Spread-spectrum technology in the military 50 years ago, was first publicly introduced, which is used to transmit confidential. It is designed from the start against noise, interference, obstruction and unauthorized detection. Used for extended frequency Chu sent a very weak power signal in a wide frequency range Launch Out, and narrow-band RF On the contrary, it will concentrate all the energy of a single frequency. Implementation of spread spectrum in different ways, the two most commonly used is direct sequence and frequency hopping sequence.

? User authentication and password control. That is, to use the wireless network password control sites, of course, not limited to wireless networks. Currently, some major network operating systems and Server Are provided, including password management, including built-in multi-level security services. Password should be at the strict control and often to change. As the WLAN users are Mobile Users, mobile users tend to their Notebook Computer Move to remove, therefore, strict password policy adds a security level equivalent to, it helps to confirm whether the site is being legitimate users.

? Data encryption. If the user data demanding security, for example commercial or military on-line data network, you may want to take some special measures. Finally, is the highest level of security is on the network as a whole the use of encryption products. The data packet sent to the local area network software or hardware prior to use encryption methods. Only those with the correct key to restore the site can read the data. If you need comprehensive security, encryption is the best way. Some network operating system with encryption capabilities. Based on each user or server, third-party encryption products with lower price then they can do, there are a variety of encryption products to ensure that only authorized users can access the network, read, and each user to pay only the lower end costs. In view of third-party encryption software developers dedicated to encryption services, and can provide users with the best performance, quality, service and technical support, has been the active support of WLAN providers.

WLAN also some other good security features. First, the wireless access point will Filter Those related to wireless site in terms of useless network data, which means that most of the wired network data would not have to launch out in the form of radio waves. Second, the wireless network nodes and access points have a range of environment-related restrictions on forwarding, this range is generally a few feet. This makes eavesdropping must be in the vicinity of the node or access point. Finally, with the mobility of wireless users, they may be in a line of time moving from one access point to another access point, corresponding, they used the network traffic will change frequency hopping sequence, which makes eavesdropping virtually impossible.

Short, WLAN security technology, will greatly promote the development and application of wireless networks, broadband wireless networks for security communications era lay a solid foundation.

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