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. 22, 2009
Filed:
Sep. 07, 1998
Michael Lamla, München, DE;
Hermann Drexler, München, DE;
Wolfgang Rankl, Frauenau, DE;
Franz Weikmann, München, DE;
Wolfgang Effing, Gilching, DE;
Michael Lamla, München, DE;
Hermann Drexler, München, DE;
Wolfgang Rankl, Frauenau, DE;
Franz Weikmann, München, DE;
Wolfgang Effing, Gilching, DE;
Giesecke & Devrient GmbH, Munich, DE;
Abstract
The invention relates to a method for testing the authenticity of a data carrier () and/or an external device () which enters into data exchange with the data carrier (). According to the invention, the data carrier () and the external device () are each equipped with a special additional apparatus () for generating and/or testing authenticity data. Data transmission between the data carrier () and the external device () as required for authenticity testing is performed at least partly via a special transmission channel (B). The transmission channel (B) for transmitting authenticity data is separated physically or logically from a transmission channel (A) for transmitting standard data so that there is no mutual interference of data transmission via the two transmission channels (A, B). In authenticity testing, the additional apparatuses for generating and/or testing authenticity data () of the data carrier () and external device () and optionally also the transmission channel (B) for authenticity data must meet special demands which cannot be met by conventional designs. The transmission channel (B) for transmitting authenticity data is activable during the total time period between activation and deactivation of the data carrier () so that authenticity testing can be performed anytime.