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Bad Reception

Employees' PDAs and portables pluck information off your wireless network all the time--now it's the hackers' turn.

By Mike Hogan •

Opinions expressed by Entrepreneur contributors are their own.

Who's reading your e-mail? Hackers? Competitors? Ifyou're among the companies that have set up an 802.11b-orWi-Fi-Wireless LAN (WLAN), you may have more people downloadingfiles from your network than you have on your payroll. Some mayeven be planning to sabotage you.

Crackers (expert hackers) have begun "wardriving"-that is, cruising neighborhoods using snifferprograms on Wi-Fi-equipped portables to find WLAN nodes.They're also developing software to exploit 802.11b's weak40-bit Wired Equivalent Privacy (WEP) encryption and othervulnerabilities.

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