Einrichtung zum Identifizieren des richtigen Benutzers einer Karte in einem Selbstverkaeufer oder einer aehnlichen Vorrichtung

摘要

A system for identifying the proper user of a credit card or the like in a vending machine or the like. Each card used in the system is given two different code numbers, one of which is written on the card as the card number with the other being known to the proper owner of that card as its secret number. When a card is introduced into the system, the user of the card enters into the system its secret number by means of a dial or the like. There are provided in the system several types of operation, one of which is selected in accordance with the card number of the introduced card and the selected type of operation is conducted on the secret number. The result of the operation is compared with a predetermined number and when correspondence between the card number and the secret number is recognized on the basis of the result of the comparison, the user of the card is identified as the proper owner of that card.