System and method for generating collision-free identifiers...

Details System and method for generating collision-free identifiers... System and method for generating collision-free identifiers...

2007-11-27

2007-11-27

Lee, Michael G. (Department: 2876)

Registers

Systems controlled by data bearing records

Reexamination Certificate

active

11042906

ABSTRACT:
A one-way permutation over financial transaction card data provides a merchant with a unique card identifier for each financial transaction card that is used by a customer to purchase goods from a merchant. This card identifier, which is not the actual financial transaction card data, may then be permissibly stored by the merchant and used to uniquely identify the customer's financial transaction card, and may also be used to determine the frequency with which that customer makes purchases using that card.

REFERENCES:
patent: 5867577 (1999-02-01), Patarin
patent: 6226743 (2001-05-01), Naor et al.
patent: 6311167 (2001-10-01), Davis et al.
patent: 2003/0130955 (2003-07-01), Hawthorne

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