That is a fantastic question, and legitimate concern to have. Samsung pay is safe to use because of Knox security, what Knox security is, is basically a secondary vault of encryption for certain files that you have on your device (i.e. the gallery, notes, Samsung pass, calendar, etc...) Furthermore, Samsung pay does not give vendors the last four of your actual cards, rather you give them 4 digits that show up on your card through the app, without actually giving them your personal information. AS well as Samsung pay gives you NFC payment method as well as MST (every other terminal that does not accept NFC. Try it out, get Samsung rewards, and fall in love with not having your wallet on you at all times
Paying with mobile wallet is often more secure than swiping with your card. That is because Samsung Pay doesn't store your personal or financial information directly on your device. Instead, it uses tokenization for transactions.
i use samsung pay and a lot of the time since i forget my wallet at home, i trust it cause i havent had any card issues or bank problems. nothing fruadulant, knox security keeps it on lock and ive used since getting my s9+ 2 years ago.
I was skeptical about Samsung Pay at first too. But knowing that several layers of security exist, including knox, and other security features I gave it a try. It works good and works at most pay terminals even ones that don't have NFC.