Method for operating a transaction execution system having impro

Details Method for operating a transaction execution system having impro Method for operating a transaction execution system having impro

1980-02-11

1983-05-31

Yusko, Donald J.

Registers

Systems controlled by data bearing records

Credit or identification card systems

375 21, 3408253, G06K 500

Patent

active

043862667

ABSTRACT:
A transaction execution system including at least one transaction terminal in communication with a host data processing system. A transaction at the terminal is authorized based, at least in part, upon correspondence of personal identification data entered by the terminal operator at a keyboard with account identification data read from an account card. When the personal identification data is not derived from the account identification data, the correspondence check is made at the host data processing system by comparison of encrypted identification data with validation data. The host may, upon failure of correspondence, communicate a conditional authorization message to the terminal, which enables the terminal operator to again attempt to enter the correct personal identification data. The host data base stores as validation data encrypted identification data, and only double encrypted identification data appears on the communication lines.

REFERENCES:
patent: 3938090 (1976-02-01), Borison et al.
patent: 3956615 (1976-05-01), Anderson
patent: 4016405 (1977-04-01), McCune et al.
patent: 4023013 (1977-05-01), Kinker
patent: 4075460 (1978-02-01), Gorgens
patent: 4186871 (1980-02-01), Anderson et al.
patent: 4223403 (1980-09-01), Konheim et al.
patent: 4234932 (1980-11-01), Gorgens

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