> paying by card offline. How is this going to be implemented I wonder. Paying offline used to be the norm for credit cards, from their introduction in the 196

> paying by card offline. How is this going to be implemented I wonder. Paying offline used to be the norm for credit cards, from their introduction in the 1960s until some two decades ago. Wikipedia: [...] until always-connected payment terminals became ubiquitous at the beginning of the 21st century, many merchants accepted all charges, especially those below a threshold value or from known and trusted customers, without verifying them by phone. Books with lists of stolen card numbers were distributed to merchants who were expected in any case to check cards against the list before accepting them, as well as verifying the signature on the charge slip against that on the card.