Recently at the Security Convention DEFCON, some enterprising wi-fi gurus got an unamplified 802.11 network set up over a distance of 124.9 miles!
Oh and you know the new RFID chips everyone talks about using, espcially in credit cards? The credit Cards companies would like you to believe that they can only be picked up "a few inches away." The world record for communicating with a passive RFID device was set at 69 feet.
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