Aircrack-ng for Windows - Arpforge-ng:
Aircrack-ng is the next generation of
Christophe Devine's excellent aircrack suite of tools.
INSTALLING AIRCRACK-NG FOR
Arpforge is used in conjunction with aireplay (only available on Linux) to
decrypt a WEP data packet without knowing the key. At least one data
packet has to be decrypted (utilising aireplay -4).
Once the packet is decrypted the source MAC (of an associated station) and
destination IP (of a station that replies to ARP requests) are noted.
This MAC and IP address are then used with arpforge to forge an ARP request in
order to speed up the data packets being passed across the network for WEP
cracking purposes. The ARP request is then replayed with aireplay.
example arpforge packet generation:
replay_dec-0627-022301.xor 1 00:13:10:30:24:9C
00:09:5B:EB:C5:2B 192.168.1.100 192.168.1.2 arp.cap
http://tinyshell.be/aircrackng/wiki/index.php?title=KoreK_chopchop for a
full break down of each step.