Aircrack

Aircrack is a software suite designed to crack WPA and WEP by gathering a large enough number of packets. It has various tools and features designed around that purpose.

Kali/WEP Cracking: This was my first introduction to Aircrack was using it to crack a WEP-encrypted passphrase. The actual cracking process took about three minutes. It was amazing to be able to do this so easily, and it was a great learning process.