Yescard is a smart card, blank originally in which a program and specific data are programmed by a pirate. It behaves like a credit card emulator, it perfectly simulates the operation, except that it accepts any 4-digit code.
These cards can only be used on machines taking into account only the chip: fuel pumps, distributors , ATM , POS
Hackers can generate card numbers randomly. In general, the number and the name given by the card holder is false. In addition, during a transaction, the card must generate a certificate by an 8-byte DES cryptographic computation. Which is obviously strange with Yescard, the chip used does not have the secret PIN needed for MAKE THE TRANSACTION.
These cards can only be used on machines taking into account only the chip: fuel pumps, distributors , ATM , POS
Hackers can generate card numbers randomly. In general, the number and the name given by the card holder is false. In addition, during a transaction, the card must generate a certificate by an 8-byte DES cryptographic computation. Which is obviously strange with Yescard, the chip used does not have the secret PIN needed for MAKE THE TRANSACTION.