How to Use BackTrack to crack the WEP Key of Wi-Fi networks (1)

You may already know that if you want to lock your Wi-Fi network, you 'd better choose the WPA encryption method because WEP encryption is easily cracked. But do you know how easy it is? Let's take a look.

Note: This post verifies how to crack the rarely used and outdated WEP encryption protocol.

Today, let's take a look at how to crack the Wi-Fi network encrypted using WEP encryption method step by step. However, knowledge is a kind of power, but power does not mean you should be a player or do anything illegal. Knowing how to pick a lock won't make you a thief. Please apply this post to the educational nature or conceptual verification test.

There are many tutorials on how to use this solution to crack WEP encryption on the Internet. Seriously under Google, this cannot be called news. However, it is surprising that, for example, I only have a few cainiao who have little network experience. I can also use some free software and cheap WIFI adapters to crack this problem. Let's take a look!

What do you need

Unless you are a computer network security ninja, you are unlikely to have all the tools to complete the experiment. The following are what you need:

A compatible wireless adapter. This is the main requirement. You need a wireless adapter for package injection. Your computer may not have this function. After discussing with my security expert neighbor, I spent $50 on Amazon to buy an Alfa AWUS050NH adapter, as shown in the figure above. Update: do not learn from me. In fact, you should buy Alfa AWUS036H instead of US050NH. The buddy in the video bought a modem on Ebay for $12 USD (you can also choose to sell your vro ). There are many adapters compatible with aircrack on the Internet.

A BackTrack Live CD. We have provided a complete BackTrack 3 installation and usage tutorial. Linux Live CD allows you to complete all the security testing and testing work. Download a CD image and burn it or start it from VMware.

A nearby WEP-encrypted Wi-Fi network. The signal needs to be strong enough. Ideally, it is best to have the user using, connecting, and disconnecting the device. The more people use the network, the more data you can crack, and the more likely you are to succeed.

The command line patience. There are a total of 10 steps here, a total of long and difficult commands need to be entered, and then wait for your wifi card to collect enough password cracking data. As a doctor and an impatient patient said, You need to be patient.