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.
Sean Darks, the chief executive of Citywatcher.com, points to the VeriChip implant he has in his arm.
 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.
But the news that Americans had, for the first time, been injected with electronic identifiers to perform their jobs fired up a debate over the proliferation of ever-more-precise tracking technologies and their ability to erode privacy in the digital age.
To some, the microchip was ...   more »