I made a purchase w/ Apple Pay and the last 4 digits of the credit card on the receipt do not match my credit card for my Apple wallet. However, the charge did go through on my account. I am worried that my bank information has been exposed.
iPhone 6, iOS 12
That is a security measure to insure your information is not exposed. See information in Apple Pay security and privacy overview - Apple Support including the following:
After your card is approved, your bank, your bank’s authorized service provider, or your card issuer creates a device-specific Device Account Number, encrypts it, and sends it along with other data (such as the key used to generate dynamic security codes that are unique to each transaction) to Apple. The Device Account Number can’t be decrypted by Apple but is stored in the Secure Element—an industry-standard, certified chip designed to store your payment information safely—on your device. Unlike with usual credit or debit card numbers, the card issuer can prevent its use on a magnetic stripe card, over the phone, or on websites. The Device Account Number in the Secure Element is isolated from iOS, watchOS, and macOS, is never stored on Apple servers, and is never backed up to iCloud.
Apple doesn’t store or have access to the original card numbers of credit, debit, or prepaid cards that you add to Apple Pay. Apple Pay stores only a portion of your actual card numbers and a portion of your Device Account Numbers, along with a card description. Your cards are associated with your Apple ID to help you add and manage your cards across your devices.
That is a security measure to insure your information is not exposed. See information in Apple Pay security and privacy overview - Apple Support including the following:
After your card is approved, your bank, your bank’s authorized service provider, or your card issuer creates a device-specific Device Account Number, encrypts it, and sends it along with other data (such as the key used to generate dynamic security codes that are unique to each transaction) to Apple. The Device Account Number can’t be decrypted by Apple but is stored in the Secure Element—an industry-standard, certified chip designed to store your payment information safely—on your device. Unlike with usual credit or debit card numbers, the card issuer can prevent its use on a magnetic stripe card, over the phone, or on websites. The Device Account Number in the Secure Element is isolated from iOS, watchOS, and macOS, is never stored on Apple servers, and is never backed up to iCloud.
Apple doesn’t store or have access to the original card numbers of credit, debit, or prepaid cards that you add to Apple Pay. Apple Pay stores only a portion of your actual card numbers and a portion of your Device Account Numbers, along with a card description. Your cards are associated with your Apple ID to help you add and manage your cards across your devices.
Applepay
