Good at using encryption protocols to ensure Wireless Network Security

Wireless network technology is growing, but how can we use encryption protocols to ensure the security of wireless networks? This shows us how to set security.

With the increasing maturity of wireless communication technology, the price of wireless communication products is falling, and wireless LAN is gradually entering thousands of households. However, wireless network security issues are also worrying. After all, some "unexpected" people have the opportunity to access and even peek, tamper with, and damage important data files of users within the coverage of wireless signals, how can we ensure the security of wireless networks?

The application of wireless encryption protocols (WEP and WPA) is a set of effective methods. WEP enables wireless network security in the standard Wireless LAN of IEEE 802.11b/G network. To enhance network security, WEP encryption protocol is widely used by common household users. WEP (Wireless Equivalent Privacy) stands for "Equivalent Wireless protocol". It uses the RC4 encryption algorithm and has two authentication methods: "Open System and shared key". In addition, WEP provides 64-bit, 128-bit, and 152-bit keys. The longer the key, the higher the security. The Application of WEP encryption protocol in wireless networks WEP encryption protocol is very simple, the author takes "TL-WR541G" wireless router as an example to introduce in detail.

Log on to the wireless router management interface using the client's IE browser, and expand "Wireless Settings/Basic settings" in turn. In the Basic settings window, select "Enable Security Settings. Select "WEP" in the "Security type" drop-down box, and then select the authentication method. It provides three methods: "automatic selection, open system, and shared key". To ensure security, we recommend that you select "shared key ". The length of the key is set below. It provides 64-bit, 128-bit, and 152-bit values. Of course, the longer the key length, the more secure it is. Select the Key Length Based on the security requirements, then, set the WEP encryption key in the "key" box, and click "save" to restart the wireless router to complete the WEP encryption protocol settings.

After you modify the WEP encryption protocol applied to the client in the wireless network, you must modify the wireless network parameter settings of the client. Otherwise, you cannot access the wireless network, take the "Wireless Zero Configuration" service of Windows XP as an example. Right-click the wireless network card icon, select "status", click "properties", switch to the "wireless network configuration" tab, and find the wireless network project in the "preferred network" box, click "properties" to switch to the "join" tab. Select "shared" in the "Network Verification" box, "WEP" in the "Data Encryption" box, and enter your WEP Key in the "Network key" column, click "OK" to connect to the wireless network again.

Although the WEP encryption protocol can ensure the wireless security of ordinary home users, it is also insufficient. The WEP Key is fixed, the initial vector is only 24 bits, and the algorithm strength is not strong, attackers can use WEPCrack and AirSnort tools to crack the attacks. Therefore, home users with higher security performance requirements may have some potential risks. The application of WPA encryption protocol solves this problem. WPA is used to build a wireless network copper wall. Due to the security risks of WEP, some home users use WPA with higher security. WPA (Wi-Fi Protected Access) is short for "wireless protection Access". It changes the key generation method and enhances the key generation algorithm, WPA effectively solves the deficiencies in WEP encryption applications because it uses more frequent key conversion methods to achieve higher security.

For home users, the simplified version of the WPA protocol (WPA-PSK), and it is easy to operate, high security, as long as an independent wireless router or Wireless AP can be achieved. Apply WPA-PSK encryption select WPA-PSK/WPA2-PSK in the security Type box in the Basic settings window of the wireless router, and then set security options ", it provides "automatic selection, WPA-PSK and WPA2-PSK" three ways, the author chooses "WPA-PSK"; then set the encryption method, there are "TKIP, AES" two, the author chooses "TKIP "; set the "PSK password" below. Note that the password can contain a minimum of 8 characters. After setting the password, click "save" to restart the wireless router. This completes the WPA-PSK settings.

After you modify the client wireless network to apply the WPA-PSK encryption protocol, you also need to modify the client settings. On the "wireless network configuration" tab, select a wireless network project in the "preferred network" box, click "properties", and switch to the "associate" tab, in the network authentication bar, select WPA-PSK, and then change the data encryption project to TKIP ", then, enter your PSK password twice in the "Network key" column and click "OK" to connect the client to the wireless network. Whether WEP or WPA encryption protocol is used in your wireless network depends on your requirements for network security. For average home users, use WEP protocol, if you have special requirements on network security, you must use the WPA protocol.