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Standard Disclaimer: This article is provided for informational purposes only. thew0rd.com and its affiliates accept no liability for providing this information.  Please only use to test configurations on your own equipment.  Accessing WIFI networks that do not belong to you is ILLEGAL.

This article will explan how to crack 64bit and 128bit WEP on many WIFI access points and routers using Backtrack, a live linux distribution. Your mileage may very.  The basic theory is that we want to connect to an Access Point using WEP Encryption, but we do not know the key.  We will attack the wifi router, making it generate packets for our cracking effort, finally cracking the WEP key.  I have tested this technique on an IBM Thinkpad x60 and Acer 5672 and the WIFI Chipset in those machines work for sure.

Requirements:

• Backtrack 3 on CD or USB
• Computer with compatible 802.11 wireless card
• Wireless Access point or WIFI Router using WEP encryption

I will assume that you have downloaded and booted into Backtrack 3.   If you haven’t figured that part out, you probably shouldn’t be trying to crack WEP keys.  Once Backtrack is loaded, open a shell and do the following:

Check out the rest of this great article at The W0rd: http://thew0rd.com/2008/08/19/tutorial-cracking-wep-using-backtrack-3/

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Filed under: Hacking