Defend against Wi-Fi security threats such as Evil Twin attacks.

That soap opera cliché, the Evil Twin, is alive and well--and perhaps hanging out an Internet café near you. In the past few months, reports have emerged of Evil Twin attacks (also called "wi-phishing") targeting wireless network users at public hotspots. This week, I'll explain how Evil Twin attacks work and how you can defend yourself against these--and other--Wi-Fi security threats. Unlike wired networks, wireless networks broadcast data over radio waves, which can be easily intercepted. By its very nature, then, a wireless Internet connection is less secure than a wired one. Along with the usual concerns of any computer user--spyware, viruses, and other malware--wireless network junkies must also be particularly careful of hackers.