Aircrack-ng

Another tool for scanning wireless networks is Aircrack-ng. This is specifically used to crack the passwords of secured wireless networks. The tool is advanced and has algorithms that can crack WEP, WPA, and WPA2 secured wireless networks (1). It has simple commands and even a newbie can easily crack a WEP secured network. The potential of the tool comes from its combination of FMS, Korek, and PTW attacks. These attacks are highly successful against algorithms used for encrypting passwords.

FMS is normally used against RC4 encrypted passwords. WEP is attacked using Korek. WPA, WPA2, and WEP are attacked using the PTW attack15. The tool is thorough and almost always guarantees entry into networks that use weak passwords.

Following is a screenshot of Aircrack-ng: