Wireless LANs allow mobile users quick, easy network access and are popping up in corporate offices, hotels, airports, schools, and even large public spaces at an astounding rate. Yet broadcasting network traffic through the open air raises substantial security concerns. If you support a WLAN, do you use any of the following security measures or something totally different: WEP, MAC filtering, WPA or WPA2, VPN, LEAP?
If you rely on WEP you should check out this March 2005 report from tomsnetworking.com:
http://www.tomsnetworking.com/Sections-article111.php
It outlines how FBI agents were able to crack a 128 bit WEP key in about three minutes using current cracking techniques.