SECURITY SYSTEM FOR MAGNETIC AND OTHER IDENTITY OR CREDIT CARDS AND DEVICES
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
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.