3-D Secure is an international security standard designed to ensure enhanced security and authentication for you when you use your debit or credit cards for online purchases. It is supported by MasterCard (“MasterCard SecureCode”) and Visa (“Verified by Visa”). It is deployed at the point of transaction and typically involves the customer being asked by their card issuing bank to enter a passcode or password to prove that they are the legitimate cardholder. It was developed to reduce the risk of unauthorized use of the credit card by third parties. For more info, please contact your issuing bank.