Have a laptop, or a wireless internet card in your PC? Have you ever been in the position that where you lost your WEP / WPA key, and you interested on retrieving it back? Well with Aircrack you can.

Aircrack is a set of tools for auditing wireless networks. It consists of: airodump (an 802.11 packet capture program), aireplay (an 802.11 packet injection program), aircrack (static WEP and WPA-PSK cracking), and airdecap (decrypts WEP/WPA capture files).

I have used aircrack to try and hack my own wireless network and I happy to say I am as secure as I can get wirelessly. Again Aircrack comes with the four following pieces of software to help you secure your wireless internet connection

airodump (an 802.11 packet capture program)
aireplay (an 802.11 packet injection program)
aircrack (static WEP and WPA-PSK cracking)
airdecap (decrypts WEP/WPA capture files)