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:
Mar. 20, 2012
Filed:
Jun. 25, 2007
Martin Fischer, Pfedelbach, DE;
Ulrich Friedrich, Ellhofen, DE;
Jens Masuch, Hellbronn, DE;
Michael Pangels, Ludwigsburg, DE;
Dirk Ziebertz, Eberstadt, DE;
Martin Fischer, Pfedelbach, DE;
Ulrich Friedrich, Ellhofen, DE;
Jens Masuch, Hellbronn, DE;
Michael Pangels, Ludwigsburg, DE;
Dirk Ziebertz, Eberstadt, DE;
Atmel Corporation, San Jose, CA (US);
Abstract
A method for data exchange is provided, whereby a first code is generated by a transponder, which is transmitted to a base station, a first transmission information is generated by the base station by encoding a base station code with a first identification and the first random number code, the first transmission information is transmitted to the transponder and the base station code is extracted by the transponder, a second code is generated by the transponder, which is transmitted to the base station upon an associated request from the base station, whereby before a transmission to the base station the second code is encoded with the extracted base station code, a second encoded transmission information comprising a second identification is generated by the base station with use of the second code and transmitted to the transponder, and at least one memory region of the transponder is released for read and/or write access after the second identification was verified as valid. The invention relates further to a transponder and to a system for secure data exchange.