Method for executing a transaction between an IC-card and an information system

摘要

The process relates to problems which can arise when two smart cards are connected simultaneously to a card reader and the central processing system. Transaction data is stored provisionally in non-volatile memory within the smart cards and each card sends a message to the card reader that the transaction data is prepared. The reader receiving the these messages from the two cards verifies the transaction then sends a message to each card that the transaction can proceed. In this way the transaction is verified and proceeds without risk of fraud or failure due to faults in the processing system.