identifying chips no bigger than a grain of rice and embedded beneath a person’s skin, the computer identifying chips will be the future id card someday. id cards are easy to counterfeit while the chips are extremely hard to remove or fake. in addition, the chip has no power supply; rather, it has a millimeter-long magnetic coil that is activated when a scanning device is running across the skin above it. a tiny transmitter on the chip sends out the data. but without the scanning device the chip can’t be read. by limiting the use of scanners can people control what the technology is used for. airports, nuclear plants and other high-security