WPS crack

So, what is WPS?
WPS (Wi-fi protected setup) is a computing standard that attempts to allow easy establishment of a secure wireless home network.

Why is vulnerable?
WPS has been shown to easily fall to brute-force attacks (discovered by Stefan Viehbock).
WPS ask you a 8 pin number (the last digit is checksum), so we've 10^8 combinatios, but WPS say you when the first (or the last) 4/3 pin is correct so we've 10^4+10^3 (11000) combinations.

How can we exploit this vulnerability?
There are two script (written by Stefan Viehbock):
-Reaver
-Wspcrack

If you have a problem or you need some explanations just write under this post!