This integration was announced almost exactly a year ago and should have arrived earlier this year. Moreover Visa Checkout already celebrated 20 million customers. Visa checkout is basically meant for online transaction and purchases. with Checkout service, you can order from an online retailer or buy more gems for that extra addictive game.
As i said earlier it makes use of a Username and Password, So therefore looking more at the security of the Visa Checkout, i will say this is secured by whatever authentication methods your phone has to offer – fingerprint, iris scanner and whatever smartphone makers dream up in the future. For its part, Visa secures the transaction with 3-D Secure 2.0 and EMVCo Token Service. These are automatically available to site and app developers who integrate Checkout