If you want to know how insecure today's wireless networks are, just ask the people who make it their mission to locate the access points designated by companies and consumers around the world. . .

If you want to know how insecure today's wireless networks are, just ask the people who make it their mission to locate the access points designated by companies and consumers around the world.

Armed with laptops, special software and some makeshift hardware, these wireless explorers drive through cities, suburbs and business parks in search of the signals that connect computers to wired networks and the Internet. The practice is called "wardriving," a term derived from the "wardialing" tactic of the movie "War Games," where a hacker dials every number in an area to find a modem.

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