A simple guide to Wi-Fi security
Dos and Donts for protecting your wireless network
By Eric Geier | Network World US | Published: 10:35, 10 November 11
Don't trust hidden SSIDs
One myth of wireless security is that disabling the SSID broadcasting of APs will hide your network, or at least the SSID, making it harder for hackers. However, this only removes the SSID from the AP beacons. It's still contained in the 802.11 association request, and in certain instances, the probe request and response packets as well. Thus an eavesdropper can discover a "hidden" SSID fairly quickly, especially on a busy network, with a legitimate wireless analyser.