3D Secure is a fraud prevention tool that provides an additional layer of security for online transactions. It is used by banks and card issuers to authenticate the identity of the cardholder during the payment process. 3D Secure works by adding an extra step to the checkout process where the cardholder is redirected to a secure page hosted by their card issuer to enter a unique password or code, or to confirm their identity in another way, before the transaction is authorized. This helps prevent unauthorized use of the card and reduces the risk of fraud. The most common 3D Secure implementations are Verified by Visa and Mastercard SecureCode.
