About half of all enterprises neglect wireless local area network (WLAN) security, according to a new Jupiter Research report. Just as bad, many enterprises that do deploy wireless security rely on simple but relatively ineffective measures like Wired Equivalent Privacy (WEP), the report says.

The report also exposes another, lesser-known wireless security problem: unauthorized, or "rogue" wireless users. These rogues aren't hackers but regular employees who install their own WLAN equipment so they can use their laptops in the lunchroom or patio. One consultant noted recently that as many as 70 percent of enterprises that deploy WLANs are plagued by this problem, which can rip huge holes in already shaky wireless security environments.

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