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:
Feb. 20, 2007
Filed:
Jan. 27, 2000
Method for exchanging at least one secret initial value between a processing station and a chip card
Wolfgang Rankl, Frauenau, DE;
Wolfgang Rankl, Frauenau, DE;
Giesecke & Devrient GmbH, Munich, DE;
Abstract
The invention relates to a method for exchanging at least one secret initial value between a processing station and a chip card, in an initializing step for the chip card. In the initialization of chip cards in known methods an initial value, e.g. a key, is transmitted from a processing station to the chip card and stored therein. Since this key is transmitted in plaintext this involves security problems. In the present invention the described security problems are solved by only parts of the key being exchanged between processing station and chip card and the key being generated in the chip card and the processing station from the parts.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile