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

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

G - Physics

06

K

G06K 5/00 (2006.01)

Patent

CA 2554098

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.

Selon l'invention, une permutation unidirectionnelle des données d'une carte de transaction financière fournit à un marchand un identificateur de carte unique pour chaque carte de transaction financière utilisée par un client pour acheter des marchandises chez ce marchand. Cet identificateur de carte qui ne correspond pas aux données réelles de la carte de transaction financière peut ensuite faire l'objet d'un stockage autorisé chez le marchand et être utilisé uniquement pour identifier la carte de transaction financière du client, et peut en outre servir à déterminer la fréquence avec laquelle le client fait des achats au moyen de cette carte.

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