The number cannot be intercepted by the user's PC, the Internet or the merchant's Web server. Because the payment cannot be contested or stopped, the merchant is sure to be paid. He must adhere only to the legally allowed withdrawal period for online purchases. In France, the period is seven days. Trust is built through the verification of all participants in the transaction.
Simplicity is inherent to the smart card.
Security is provided by the chip on the card. Payment is guaranteed to merchants.