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:
Dec. 21, 1999
Filed:
Feb. 12, 1997
Applicant:
Inventors:
Peter Jacobus De Rooij, Leuven, BE;
Antoon Wilfried Bosselaers, Leuven, BE;
Assignee:
Koninklijke Kpn N.V., Groningen, NL;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
235379 ; 235380 ; 380 24 ; 902 26 ;
Abstract
A method of securely storing and retrieving monetary values, such as electronic checks and electronic coins. In an interactive protocol between an issuer (e.g., a bank terminal) and a recipient (e.g., a smart card) of electronic money, authentication values (A, B, . . .) are produced by the issuer and are stored in an external storage device (e.g., an electronic wallet). At a later stage, the protocol is repeated between the recipient and the storage to securely retrieve the stored authentication values.