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BackTrack 5 Cookbook by David De Smet, Willie Pritchett

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Cracking a WEP wireless network

Wireless Equivalent Privacy (or WEP as it's commonly referred to) has been around since 1999 and is an older security standard that was used to secure wireless networks. In 2003, WEP was replaced by WPA and later by WPA2. Due to having more secure protocols available, WEP encryption is rarely used. As a matter of fact, it is highly recommended that you never use WEP encryption to secure your network! There are many known ways to exploit WEP encryption and we will explore one of these ways in this recipe.

We will use the Aircrack suite to crack a WEP key. The Aircrack suite (or Aircrack NG as it's commonly referred to) is a WEP and WPA key cracking program that captures network packets, analyzes them, and uses this ...

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