Amazon on Tuesday unveiled a biometric payment system using palm recognition. The company plans to make the technology available to rival retailers. The contactless system, Amazon One, will
let people use their palm to make purchases, present loyalty cards or enter a stadium or workplace. The company said engineers chose palm recognition because it's considered more
private than some biometric alternatives. Amazon said no one can determine a person’s identity by looking at an image of their palm, and it requires someone to make an intentional gesture by
holding their palm over the device to use.