Amazon One lets you pay at stores with the palm of your hand

The palm is the new fingerprint. 

Amazon One, a new service from Amazon, is a novel way of contactless payment that scans your palm for authentication. 

Besides payments, it could be used for anything that requires authentication, like entering a stadium or presenting a loyalty card. For starters, though, Amazon will introduce it in select Amazon Go stores, adding Amazon One to the stores' entry gates.

To start using Amazon One, you'll have to go through an onboarding process which consists of inserting your credit card into the Amazon One device, then hovering your palm above it, and following the instructions as the device builds your unique palm signature. Once you've signed up, you'll be able to enter Amazon Go stores just by holding your palm over the device "for a second or so," Amazon says.  Read more...