Tagging Humans with Microchips

From CNN.com - Technology:

(AP) -- CityWatcher.com, a provider of surveillance equipment, attracted little notice itself -- until a year ago, when two of its employees had glass-encapsulated microchips with miniature antennas embedded in their forearms. The "chipping" of two workers with RFIDs -- radio frequency identification tags as long as two grains of rice, as thick as a toothpick -- was merely a way of restricting access to vaults that held sensitive data and images for police departments, a layer of security beyond key cards and clearance codes, the company said. "To protect high-end secure data, you use more sophisticated techniques," Sean Darks, chief executive of the Cincinnati-based company, said. He compared chip implants to retina scans or fingerprinting. "There's a reader outside the door; you walk up to the reader, put your arm under it, and it opens the door." Innocuous? Maybe.

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