Difference between Passive and Active RFID is
"Passive RFID is not powered by a terminating power supply, rather it is activated by the magnetic field created by the reading device. The field is a radian sphere within the limitations of (enter mathmatical forumla here, somthing to the effect of wavelength divided by 2 pi). Thus it is rendered useless unless a reader activates/powers the unit."
Almost solves my privacy issue!
Posted by Mike at January 20, 2004 08:01 PMCheck out roy Want's article on RFIDs in the current Scientific American (January)- very well done and includes a good sidebar on privacy issues.
Posted by: sfisher at January 21, 2004 09:24 PM
Thanks Scott! And I PROMISE that I have my thesis locked down now. No more changes last minute!
Posted by: Mike at January 24, 2004 06:24 PM
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