Method for tracing payment data in an anonymous payment...

G - Physics – 07 – F

Patent

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G07F 7/08 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2226320

The invention relates to a method for tracing payment data in an anonymous payment system having electronic payment means, such as so-called "smart cards". According to the invention, the user (U) commits himself to a value (w; w'') which may later be used for the tracing by a payment institution (B). The value (w) is preferably recorded with the help of a so-called one-way function (F) and an (electronic) signature (.sigma.), so that the payment institution does not dispose of the value itself, but is able to verify it on the basis of the stored derivative (w'') of the value. The invention further relates to a payment means and a payment system for application of the method.

Cette invention concerne un procédé permettant de suivre des données de paiement dans un système de paiement anonyme comprenant un moyen de paiement électronique tel que des cartes à puce. Selon cette invention, l'utilisateur (U) adopte une valeur (w; w'') qu'il reconnaît et qui pourra ensuite être utilisée pour qu'un organisme (o) de paiement effectue un suivi. La valeur (w) est de préférence enregistrée à l'aide d'une fonction (F) dite à sens unique et d'une signature électronique (.sigma.) de sorte que l'organisme de paiement ne dispose pas de la valeur elle-même, mais qu'il puisse la vérifier en se fondant sur la dérivée mémorisée (w'') de la valeur. Cette invention concerne également un moyen de paiement et un système de paiement permettant de mettre en oeuvre le procédé.

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