| 摘要 |
PURPOSE:To securely judge the validity of a secret number key by checking the validity of ID and the secret code key which is set to the cash dispenser CD when dealing with cash transaction of the CD. CONSTITUTION:The keyboard control circuit 3, bank note pay-out control circuit 4, card system control circuit 5 and voucher issuing control circuit 6 as well as the memory 2 which stores programs is connected to the CPU1 of the CD as I/O apparatus. Moreover, the line control circuit 12, DES chip 13 and constant setting circuit 14 is connected to the CPU1 of the CD. The DES chip codes or decodes based upon the secret code system of the DES method. The secret code key used in this secret code system is set in the constant setting circuit 14 by the setting switch 15. In the constant setting circuit 14, the secret code key judging code (ID) is also set by the setting switch 15. |
