How’s is a card purchase processed at a supermarket?

Question

When I use a debit card at a supermarket, how is the money processed after I use my card?

In: 2

Answer 1

Your card mostly just contains your bank account credentials. After you authorized the payment the device will contact your bank through the internet to transmit the billing information and they will put the payment task into their system from where it’s executed sooner or later.

And yes it’s all encrypted, your account information can’t be easily stolen.