AirSnort is a wireless LAN (WLAN) tool which recovers encryption keys. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered.
It has many uses:
Verify that your network is set up the way you intended. Find locations with poor coverage in your WLAN. Detect other networks that may be causing interference on your network. Detect unauthorized "rogue" access points in your workplace. Help aim directional antennas for long-haul WLAN links. Use it recreationally for WarDriving. *Wifi Drivers (Must Install)