There was a video on that a few years back that you might find interesting: https://www.youtube.com/watch?v=HRXb-FZ6WFM https://www.youtube.com/watch?v=HRXb-FZ

There was a video on that a few years back that you might find interesting: https://www.youtube.com/watch?v=HRXb-FZ6WFM https://www.youtube.com/watch?v=HRXb-FZ6WFM Basically - yes, it's more secure than just a credit card number, though if it works the same way it did in 2012 there's still all sorts of shenanigans you could pull.