Method for effecting an electronic payment transaction

Details Method for effecting an electronic payment transaction Method for effecting an electronic payment transaction

G - Physics

06

K

G06K 19/067 (2006.01) G07F 7/08 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2220735

The invention relates to a method for protected payment with electronic payment means, such as "intelligent" payment cards ("smart cards"), in a variable number of steps. In this connection, use is made of a non-reversible function (F), of which successive function values (.beta.i) are provided by the payment means (1, I) to the payment station (II) in question by way of proof of payment. On the basis of these function values (.beta.i), there may take place both a verification and a determination of the number of steps. Such method finds application, e.g., in public telephones and in copiers. The invention further relates to a payment means and a payment system for applying the method.

L'invention concerne un procédé pour protéger un paiement avec un moyen de paiement électronique du type carte de paiement électronique intelligente ("cartes intelligentes") en un nombre variable d'étapes. Le moyen utilisé à cette fin est une fonction non réversible (F) dont les valeurs successives (.beta.¿i?) sont fournies par le moyen de paiement (1, I) au poste de paiement en question (II) en tant que preuve du paiement. Sur la base de ces valeurs (.beta.¿i?) de la fonction, on peut effectuer une vérification et une détermination du nombre d'étapes. Ce procédé trouve des applications, par exemple dans les téléphones publics et les photocopieuses publiques. L'invention concerne, en outre, un moyen de paiement et un système de paiement pour mettre en oeuvre le procédé.

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