Cracking Passphrases
Make sure you have a powerful enough system to perform cracking operations
The above output estimates that our CPU can crack approximately 1,628.101 passphrases per second.
Cracking WEP
Aircrack-ng is capable of recovering the WEP key once a sufficient number of encrypted packets have been captured using Airodump-ng. It is possible to save only the captured IVs (Initialization Vectors) using the --ivs option in Airodump-ng. Once enough IVs are captured, we can utilize the -K option in Aircrack-ng, which invokes the Korek WEP cracking method to crack the WEP key.
Cracking WPA
We need to first capture a four-way handshake, then we can use a dictionary attack to try to crack the key.
Aircrack truly only needs two packets Specifically, EAPOL packets 2 and 3, or packets 3 and 4, are considered a full handshake.