Hey guy's I'm back with some cool tricks for you
There are lots of ways to hack a wifi passwords, I'm sharing one of them with you
for cracking wifi password you Should have a knowledge of these terms - 

AP : stands for Access Point of a w

ireless router .

MAC Address : stands for ;Media Access Control , it’s an unique address , It is in the Hexadecimal format like 00:6B:6B:2F:C8:C8 .

BSSID : It is the AP Mac Address.

ESSID : It shows the AP broadcasting name .

WEP : stands for Wired Equivalency Protocol .

WEP is a security protocol for Wifi (Wireless fidility) Networks.
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Tools used to Crack WEP are -

1. iwconfig : A tool that configures wireless adapter

2. airmon - a tool that sets your wireless adapter into monitor mode .

3. airodump - a tool that captures packet from the wireless router.

4. aircrack - a tool for decrypting of WEP keys .

Requirements

1. Backtrack 5 distribution

2. Wireless Adapter Card

Lets start the Procedure –

Step 1 :

Open a new konsole on Backtrack 5

Step 2 :

Type the command shown below -

Command 1: iwconfig wlan0

Step 3:

Put your Wifi adapter card on ‘Monitor Mode’

Open a new konsole and enter the command shown below -

Type the following command to put your card into Monitor mode .

Command : airmon-ng start (your interface)

Example : airmon-ng start wlan0

A message will be displayed on the screen that your monitor mode is enabled.

Step 4:

Display the monitor mode .

New monitor mode created named mon0

To see the monitor mode enter the command shown below -

Command : iwconfig

Step 5:

Finding a Target

Now we have to find the network that is protected by the WEP .

To find those networks we use a simple command shown below -

Command : airodump-ng mon0

Here airodump-ng is the command to start the program

mon0 is the new interface which you created in the earlier step .

Step 6:

Capture the data into file

To capture the data we use airodump tool with additional switches

like --bssid ( mac address), -c (channel), -w (filename )

Syntax of the command is -

Command : airodump-ng mon0 --bssid (Mac Address) -c (channel no.) -w (filename)

Example : airodump-ng mon0 --bssid 00:08:68:2F:C8:C8 -c 1 -w WEPkey

Step 7:

Open Home Directory .

Check your WEPkey file is created or not .

Step 8:

Crack the WEP Key using Aircrack Tool

Open a new konsole .

Then enter the command : aircrack-ng (file name)

Example : aircrack-ng WEPkey-01.cap

Withing a minute aircrack will decrypt your WEP key
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This is how we can WEP CRACKING on Backtrack 5 .
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