Abusing The Mastercard Protocol To Hack Bitcoin Into Fiat Payment Terminals

Hardware (card) wallets used today are very far from being backward-compatible. Every bitcoin card wallet needs their own app, in some cases their own reading device. In this talk we explore how the EMV protocol used in our (fiat) credit cards could be abused to complete the signature of a BTC transaction while hiding the crypto-specific stuff from the reader so we can accept crypto payments using the payment terminals out in the shops today.