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:
Sep. 26, 2006
Filed:
Dec. 20, 1997
Applicants:
Frank Schaefer-lorinser, Ober-Ramstadt, DE;
Alfred Scheerhorn, Meppen, DE;
Inventors:
Frank Schaefer-Lorinser, Ober-Ramstadt, DE;
Alfred Scheerhorn, Meppen, DE;
Assignee:
Deutsche Telekom AG, Bonn, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for enhancing data security when chip cards are used for payment transactions and input data are loaded into an algorithm when performing an authentication. The security of the debit and credit data is enhanced by subdividing the data blocks and by switching an additional feedback on and off following the downstream counters at preselected clock pulse times. The method is applicable to all authentication processes in conjunction with chip cards.