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Multiple Use Personal Key Identification Card Disclosure Number: IPCOM000066079D
Original Publication Date: 1979-Jan-01
Included in the Prior Art Database: 2005-Feb-19

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Letson, RC [+details]


Current techniques for verifying the identity of a potential customer presenting a credit card is to request the customer to enter a memorized personal identification number into a terminal for machine comparison with an encrypted number on a credit card or stored in a computer memory. The machine comparison usually involves encryption in one form or another which requires an encryption key. If this encryption key is in some way compromised, the person having unauthorized access to the key would be in a position to fraudulently attack all of the personal identification number/account number relationships within the entire system.