Amazon to bring pay-by-palm technology to Whole Foods

• Customers' palm signature' will be linked to credit cards
• Concerns raised about privacy and vulnerability to hackers

Paying for something in the shops with just a wave of your hand is a step closer to everyday reality with the news that retail giant Amazon is trialing its palm-scanning payment technology in Whole Foods.

The contactless payment method, known as Amazon One, was installed at one of the grocery stores in Seattle on Tuesday.