Security Testing and prevention of wireless network WEP (1)

BKJIA exclusive Article] with the increasingly mature wireless communication technology, wireless LAN gradually enters thousands of households. Compared with wired networks, due to the openness of Wireless LAN channels, it is easier to cause security issues, after all, within the coverage of wireless signals, hackers have the opportunity to access and even peek, tamper with, and destroy important user data files. Therefore, the security of wireless networks is particularly important. Wireless Networks are around us. If you have never touched on wireless networks before and do not know what the "SSID", "WEP", and "WPA" are, don't worry, after reading this article, I believe you will have a new understanding of wireless network security. With the increasing popularity of wireless networks and increasing security requirements, the defects of WEP encryption are gradually exposed. The test below is to tell you the disadvantages of WEP encryption. I hope you will be inspired after reading this article.

1. Test procedure:

The test uses the WinAircrackPack toolkit. The identifier is used to detect the SSID. The airodump is used to monitor the data transmitted in the wireless network. When enough data packets are collected, WinAircrack can be used to crack the key. The test environment is a TP-LINK TL-WR340G 54M wireless router and two laptops, one of which uses an Intel Pro 2200 wireless Nic, one shown.

1. Run airodump.exe in the winaircrackpackage.

Select 10 Inter PRO/Wireless 2200BG Network Connection "Nic

Appears:

Interface types：’o’ = HermesI /Realtek ‘a’= Aironet/Atheros

Enter o or a and select Nic mode. The following interface appears:

 

Select search frequency band. input 0 indicates that all frequency bands are detected. Assume that you do not know which frequency band and SSID number the wireless device uses. Press enter to display:

Output filename prefix->

Prompt you to enter a save file, so that the tool will put all the packets from sniffer into this file

Only write WEP IVs ->

Only write wep ivs checks whether only WEP encrypted packets are detected. We select "N" to check that all packets in the network are not only WEP encrypted data.

A prompt is displayed, which means that the driver is not currently supported and the sniffer operation cannot be performed. At the same time, the browser will automatically go to the ingress. Download the airodump driver that is suitable for your network card at this address. On the device search page, select the brand and model of your wireless network card. I select all wireless products of tp-link to check which driver should be downloaded. Download the package to the specified directory. Then we start to install the driver.

1. Right-click the desktop network neighbor icon, select Properties, right-click the local connection corresponding to your wireless network adapter, and select Properties.

2. Click "Configure" next to the NIC information under the "General" tab in the wireless network Connection Properties window, and click "Update driver" in the "driver" tab.

Select "install advanced from list or specified location", and then select "do not search. I want to select the driver to install"

2. A compatibility prompt will appear during driver installation. Click "continue. After completing the hardware Update Wizard, our intel Wireless Network Adapter has now become an atheros wireless network adapter, so that we can use the wireless network sniffer tool airodump. Please note that due to the many preparations for WEP cracking, you have successfully updated your NIC Driver, which is also the key to WEP encryption cracking.