Backtrack 5 Wpa2 Crack Tutorial Pdf

1 Tutorial: How to Crack WPA/WPA2 Version: 1.20 March 07, 2010 By: darkaudax Introduction This tutorial walks you through cracking WPA/WPA2 networks which use pre-shared keys. I recommend you do some background reading to better understand what WPA/WPA2 is. The Wiki [ links page has a WPA/WPA2 section. The best document describing WPA is Wi-Fi Security - WEP, WPA and WPA2 [ This is the link [ /articles/hakin9_wifi/hakin9_wifi_en.pdf] to download the PDF directly. The WPA Packet Capture Explained tutorial is a companion to this tutorial. WPA/WPA2 supports many types of authentication beyond pre-shared keys.

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Tutorial: How to Crack WPA/WPA2 Version. You can backtrack and perform this step. Table of Contents Wi Fi Protected Access 2 (WPA 2). Step by Step Backtrack 5 and wireless Hacking basics Installing Backtrack 5. Using aircrack and a dictionary to crack a WPA data capture www.wirelesshack.org Step by Step Backtrack 5 and wireless Hacking basics All information in this book is for testing and educational purposes only; for use by network. WPA or WPA2, which are really.

Aircrack-ng can ONLY crack pre-shared keys. So make sure airodump-ng shows the network as having the authentication type of PSK, otherwise, don't bother trying to crack it. There is another important difference between cracking WPA/WPA2 and WEP.

This is the approach used to crack the WPA/WPA2 pre-shared key. Unlike WEP, where statistical methods can be used to speed up the cracking process, only plain brute force techniques can be used against WPA/WPA2. That is, because the key is not static, so collecting IVs like when cracking WEP encryption, does not speed up the attack. The only thing that does give the information to start an attack is the handshake between client and AP. Handshaking is done when the client connects to the network. Although not absolutely true, for the purposes of this tutorial, consider it true. Since the pre-shared key can be from 8 to 63 characters in length, it effectively becomes impossible to crack the pre-shared key.

The only time you can crack the pre-shared key is if it is a dictionary word or relatively short in length. Conversely, if you want to have an unbreakable wireless network at home, use WPA/WPA2 and a 63 character password composed of random characters including special symbols. The impact of having to use a brute force approach is substantial.

Because it is very compute intensive, a computer can only test 50 to 300 possible keys per second depending on the computer CPU. It can take hours, if not days, to crunch through a large dictionary. If you are thinking about generating your own password list to cover all the permutations and combinations of characters and special symbols, check out this brute force time calculator [ first. You will be very surprised at how much time is required.

IMPORTANT This means that the passphrase must be contained in the dictionary you are using to break WPA/WPA2. If it is not in the dictionary then aircrack-ng will be unable to determine the key. There is no difference between cracking WPA or WPA2 networks. The authentication methodology is basically the same between them. So the techniques you use are identical.

It is recommended that you experiment with your home wireless access point to get familiar with these ideas and techniques. If you do not own a particular access point, please remember to get permission from the owner prior to playing with it. I would like to acknowledge and thank the Aircrack-ng team [ for producing such a great robust tool. Please send me any constructive feedback, positive or negative.

Additional troubleshooting ideas and tips are especially welcome. 1 of 10 07/08/:02 PM 2 Assumptions First, this solution assumes: You are using drivers patched for injection. Use the injection test to confirm your card can inject.