I have been trying to crack my WEP key for 20 minutes in Aircrack. I have about 350,000 IVs. I am using BT2. I noticed that Airodump creates 2 files that are about the same size- a .dump file and a .cap file. Which one am I supposed decrypt using Aircrack? Why would this take so long to crack? My WEP key contains 6 letters, 2 numbers, and then 2 letters. I have seen in tutorials that when Aircrack is finished cracking the key, it gives you something like this: xx:xx:xx... WEP keys don't have colons in them. How would you use this?