The latest leap in digital payments is facial recognition technology, which allows a customer to pay by flashing a smile. Ant Financial, an Alibaba subsidiary, is testing the ‘smile to pay’ service in a KFC restaurant in Hangzhou, China. Assuming that the customer has already signed up for the Alipay app and has enabled facial recognition, the technology only needs about 1 to 2 seconds of facial scanning with a 3D camera and a live detection algorithm to check their identity. The customer only has to enter their mobile phone number to help guard against fraud. The video below shows the technology’s incredible accuracy, with one woman dressing up in an array of different wigs and makeup styles, but is still completely recognisable to the machine.