Hot spots are hot. Located in thousands of airport lounges, hotels, cafés, and even public parks, they allow anyone with an 802.11b wireless LAN card to surf the Web, check e-mail, or even connect to the company LAN at broadband speeds. Before you experience the thrill of surfing the Net while nursing a latte at Starbucks, however, be sure you take the necessary precautions.

All wireless LANs have security issues, but wireless hot spots raise unique concerns. As with any wireless LAN, signals can penetrate walls and ceilings. That means that anyone in range with a standard wireless card can connect, even if they're sitting out in the parking lot.

Hot-spot services are designed for maximum ease of use, so they generally don't offer WEP or WPA encryption; if you connect to a hot spot, just about all the data you send is probably unencrypted. Since wireless LANs allow peer-to-peer connections, the computer-savvy guy at the corner table may be able to connect to your notebook and mooch your Internet connection, look at your unprotected files, or hitch a ride as you connect to your corporate LAN. He can also eavesdrop the airwaves with one of the many wireless sniffers available on the Web and watch as you unintentionally reveal your corporate network log-on information, your credit card numbers, IP addresses of your connections, and even the contents of e-mails, instant messages, and file attachments. Anyone with malicious intent can do lots of damage with this information, both to you and the company that employs you. And of course, you're vulnerable to the same viruses, worms, and other attacks as you would be on any unprotected network.So what can you do? Here are several ways you can protect yourself.