Hackers didn't hack the cards. They hacked the bank and are processing fake transactions with the more secure cards.
From the Article
Each microchipped credit card has something called a cryptogram. It tells the bank whether a card or transaction has been modified in any way.But the hackers got control of a payment terminal, they could change the data and make a fraudulent purchase.
So what happened with the cryptograms and the card security? The Consumerist says the banks were relying on them to be secure... and no one actually checked the transaction reports!
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