Scientific American Blog: "The use of microchips to track people (such as those embedded in hospital wristbands) and products (those uncomfortable tags on clothing that have to be cut off prior to wearing) has come under fire from civil rights groups who claim that big corporations are using this technology as a tool for spying. But what about when these tags are embedded in people themselves, rather than the things they wear?"
"That's what Mexican security firm Xega SA, which sells technology for tracking people, wants to do, particularly in cases when people are held for ransom. For about $3,700, the company will implant a chip the size of a grain of rice (it costs another $1,800 per year for monitoring), reports the Telegraph. Although it is unclear where the chip is likely to be implanted in a person's body its customers carry with them a panic button that can be pressed if a person feels he or she is in danger. A transmitter then sends signals via satellite to pinpoint the location of a person in distress, reports Reuters.
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