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