| 摘要 |
The invention concerns a method for carrying out a transaction comprising prior steps of identifying the card by reading its number and authenticating the bearer optionally by writing in the secret code using a keyboard. The invention is characterized in that the secret code and/or the card number, comprise(s) in a specific position at least a character modified at each transaction. The modified character(s) (N) of the secret code and/or the card is/are modified in accordance with at least a character of a predetermined parameter. |
