Method and system of payment by electronic cheque

US7505944B2 · kind B2 · utility

Assignee

• PROTON WORLD INTERNATIONAL N.V. · BE

Inventors

• Yves Moulart · Malmedy, BE
• Joan Daemen · Overpelt, BE
• Michel Dawirs · Wezembeek, BE

Key dates

• Filing date: Dec 30, 2004
• Grant date: Mar 17, 2009
• Expiry date: Mar 16, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G06Q20/40975
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

An offline payment method includes communicating a commitment value calculated by an electronic check medium to a terminal configured to receive a payment from the electronic check medium. The commitment value is calculated based on a first authentication code and secret key, wherein the first authentication code is calculated based on a payment amount and secret verification key. The terminal determines and communicates a random/pseudo-random guesstimation to the electronic check medium in response to receiving the verification code, the random/pseudo-random guesstimation being configured to verify that the electronic check medium is authentic. The electronic check medium determines and communicates a second authentication code to the terminal, the second authentication based upon the random/pseudo-random guesstimation. The terminal compares the second authentication with the random/pseudo-random guesstimation to verify the second authentication and accepts payment from the electronic check medium when the second authentication is verified.