The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1999
Filed:
Jul. 05, 1996
Applicant:
Inventor:
Peter Jacobus De Rooij, 3000 Leuven, BE;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G07F / ; G06F / ; G06F / ; H04L / ;
U.S. Cl.
CPC ...
705 39 ; 705 40 ; 380 24 ; 380 23 ; 380 25 ; 380 29 ; 235380 ; 34082534 ;
Abstract
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 commits himself to a value (w) which may later be used for the tracing by a payment institution. 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.