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How to crack a WPA/WPA2 PSK network ?

You must sniff packets (by putting your wireless network card in monitor mode) until a handshake takes place between a wireless client and the access point. Alternatively (if your network card supports packet injection) you can try to force the cilent to reauthenticate using a deauth attack with a tool like aireplay-ng.

Once you've successfully captured a 4-way handshake, you'd need to apply a brute force dictinary attack, using a tool like aircrack-ng.

A strong WPA/WPA2 passphrase can take a very long time to crack, that is why using strong passwords is imperative.

Note that the capture phase unlike WEP cracking only needs very few frames, a 4-way handshake. What makes cracking WPA/WPA2-PSK much harder is the necessary brute-force dictionary attack.


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by WiFan - 2011-08-08 20:54
Dear Wireless & B.T Prof's., i am a newbei to wifi and have a kinda silly question!
i need to know how to save the captured *.cap file to any storage media?
to make it clear:
i have applied the command : aireplay-ng....etc, and it runs pretty well, but i don't know how to stop the capturing procedure.
any help would be highly appreciated on how and what combination to press on keyboard to solve my li'l problem.

Regards.
Khaled.
by Philip - 2011-08-10 10:15
The article on cracking WEP/WPA states how to specify the capture file: http://www.speedguide.net/articles/how-to-crack-wep-and-wpa-wireless-networks-2724

As to interrupting/terminating the capture process, you can hit "CTRL+C".
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