To raise money, Tyler devised a way to hack credit cardx...allows for a man-in-the-middle attack. It essentially tricks the point-of-sale terminal into believing it has received a correct PIN no matter what digits are entered.
The card thinks that the transaction was authorized by a signature. In some instances, point-of-sale terminals may have trouble connecting back to a card's issuing bank but allow a transaction anyway if completed by a signature.
The attack requires high-level knowledge of the chip-and-PIN system and some external hardware
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