3D Secure protection system
The 3D Secure system allows banks to ensure that the cardholder is definitely the person behind a particular online card payment. In other words, 3D Secure is used to identify the person using a card to pay online - usually with a short verification code sent by SMS. This system is sometimes otherwise known as MasterCard SecureCode or Verified by Visa.
You'll only be asked for your card number and the 3-digit CVV number which can be found on the back of the card.