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SECURITY SYSTEM FOR MAGNETIC AND OTHER IDENTITY OR CREDIT CARDS AND DEVICES

IP.com Disclosure Number: IPCOM000025873D
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 94K

Publishing Venue

Xerox Disclosure Journal

Abstract

There are various permutations of magnetic, optical, punched hole, memory chip, or other memory cards where the validity of the card is established by some form of magnetic or optical reader. The card number is then checked against some form of printed list or memory. A weakness of this system is that a valid card can be copied or counterfeited and all such copies can be used with equal facility as the original.

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XEROX DISCLOSURE JOURNAL

SECURITY SYSTEM FOR MAGNETIC AND OTHER IDENTITY OR CREDIT CARDS AND DEVICES
John A. Nelson

Proposed Classification

US. C1.235i382.5 Int. C1. G06K 7/01

There are various permutations of magnetic, optical, punched hole, memory chip, or other memory cards where the validity of the card is established by some form of magnetic or optical reader. The card number is then checked against some form of printed list or memory. A weakness of this system is that a valid card can be copied or counterfeited and all such copies can be used with equal facility as the original.

Counterfieting can be minimized in the following manner. An additional number field is added to the card. A randomly chosen number is recorded in this field and in a recognition device or network memory as being assigned to the card identified by the other data fields on the card. When the card is verified, the verifying system determines that the number in the new field is valid for that particular card or the card is rejected, or collected, or alarm sounded, or other action taken to prevent use of the card. At this point, if the card has been determined to be valid, a new randomly selected number is recorded on the card and in the system memory. The next time the card is validated the process is repeated ad infinitum.

According to this system only one copy made form a valid card will be recognized as being valid and only if it is checked for validity before the original is next checked for validity. Further, if the original card...