(Agencies)
Updated: 2008-01-27 15:50

"We've seen so many different uses of the technology," says Dan Mullen, president of AIM Global, a national association of data collection businesses, including RFID, "and we're probably still just scratching the surface in terms of places RFID can be used."

The problem, critics say, is that microchipped products might very well do a whole lot more.

With tags in so many objects, relaying information to databases that can be linked to credit and bank cards, almost no aspect of life may soon be safe from the prying eyes of corporations and governments, says Mark Rasch, former head of the computer-crime unit of the US Justice Department.

By placing sniffers in strategic areas, companies can invisibly "rifle through people's pockets, purses, suitcases, briefcases, luggage - and possibly their kitchens and bedrooms - anytime of the day or night," says Rasch, now managing director of technology at FTI Consulting Inc., a Baltimore-based company.

In an RFID world, "You've got the possibility of unauthorized people learning stuff about who you are, what you've bought, how and where you've bought it ... It's like saying, 'Well, who wants to look through my medicine cabinet?'"

He imagines a time when anyone from police to identity thieves to stalkers might scan locked car trunks, garages or home offices from a distance. "Think of it as a high-tech form of Dumpster diving," says Rasch, who's also concerned about data gathered by "spy" appliances in the home.

"It's going to be used in unintended ways by third parties - not just the government, but private investigators, marketers, lawyers building a case against you ..."

Presently, the radio tag most commercialized in America is the so-called "passive" emitter, meaning it has no internal power supply. Only when a reader powers these tags with a squirt of electrons do they broadcast their signal, indiscriminately, within a range of a few inches to 20 feet.

Not as common, but increasing in use, are "active" tags, which have internal batteries and can transmit signals, continuously, as far as low-orbiting satellites. Active tags pay tolls as motorists to zip through tollgates; they also track wildlife, such as sea lions.

Retailers and manufacturers want to use passive tags to replace the bar code, for tracking inventory. These radio tags transmit Electronic Product Codes, number strings that allow trillons of objects to be uniquely identified. Some transmit specifics about the item, such as price, though not the name of the buyer.

However, "once a tagged item is associated with a particular individual, personally identifiable information can be obtained and then aggregated to develop a profile," the US Government Accountability Office concluded in a 2005 report on RFID.

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