Time for action – cracking WEP

Follow the given instructions to get started:

1. Let's first connect to our access point Wireless Lab and go to the settings area that deals with wireless encryption mechanisms:
   
2. On my access point, this can be done by setting the Security Mode to WEP. We will also need to set the WEP key length. As shown in the following screenshot, I have set WEP to use 128bit keys. I have set the default key to WEP Key 1 and the value in hex to abcdefabcdefabcdefabcdef12 as the 128-bit WEP key. You can set this to whatever you choose:
   
3. Once the settings are applied, the access point should now be offering WEP as the encryption mechanism of choice. Let's now set up the attacker machine.
4. Let's bring up Wlan0 by issuing the following command:

   ifconfig wlan0 up
   

5. Then, we will run the following command:

   airmon-ng start wlan0
   

6. This is done so as to create mon0, the monitor mode interface, as shown in the following screenshot. Verify that the mon0 interface has been created...