3-D Secure is a service that allows for safe, secure online shopping.
Register the password provided to you from your credit card company's official website, and when your transaction is ready to be approved, only you may approve the final payment.
As the cardholder with sole knowledge of this password, usage of the card by a third-party for identity fraud is prevented even in cases where your card number or card name are known to that party.
You can set the card's password on the card provider's website.
*Registration differs between card providers, so please check the card provider's site on the back of your credit card for further details.