Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1975-06-09
1977-04-05
Cook, Daryl W.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
340149A, G06K 701, H04Q 502
Patent
active
040164055
ABSTRACT:
A verification method and system for determining whether a holder of a card is authorized to complete a transaction through an on-line terminal of an institution in a network of cooperating institutions, such as banks. The method and system are also useable in such applications as accessing a security data file in a computer, entering a security area, completing a point of sale transaction and operating on-line automated tellers in banks. In the preferred embodiment, the card contains information including first data identifying the institution holding an account of an authorized card holder and second data identifying the account. The first and second data are machine read from the card and a secret number, derived from the data but known only to the authorized holder of the card, is keyboard entered by the card holder. The first data are used to address a read only memory having random characters stored therein. Random character digits outputted from the memory are successively exclusive ORed with each digit of the second data and the resultant applied to the address terminals of the memory to cause pseudo-random vectoring among random data stored in the memory. Preselected digits of the characters generated by the memory are correlated to the digits of the secret number to generate a go-no go indication of whether the holder of the card is authorized to transact in the system. By the provision of an offset number on the card, all digits of the secret number can be selected by the holder of the card when the card is issued. The offset number converts the secret number digits selected by the card holder to digits which correspond to the preselected digits of the memory generated character. The card can be verified at any institution of a network of cooperating institutions having verification systems with identically programmed read only memories. The first data contained on the card cause the transaction to be charged against the institution holding the account and prevent comingling of transaction records among the cooperating institutions.
REFERENCES:
patent: 3665162 (1972-05-01), Yamamoto et al.
patent: 3761682 (1973-09-01), Barnes et al.
patent: 3761683 (1973-09-01), Rogers
patent: 3794813 (1974-02-01), Spetz
patent: 3824375 (1974-07-01), Gross et al.
patent: 3862716 (1975-01-01), Black et al.
Kronewitter Michael R.
McCune Harold K.
Cook Daryl W.
Diebold Incorporated
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