All of the payment technologies use a form of encryption to create virtual card numbers (that is, your card's information isn't shared with a merchant). (fidelity.com)
US bank Capital One is bidding to make online shopping safer through a new feature within its Eno chatbot that lets customers use virtual card numbers for ecommerce purchases. (finextra.com)
Personally, I've actually been using virtual card numbers for almost all my (online) purchases for a long time, and only recently did it hit me that what I'm doing might be overkill (hence this question). (money.stackexchange.com)