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:
Jun. 30, 2009
Filed:
May. 17, 2004
Pim Theo Tuyls, Eindhoven, NL;
Thomas Andreas Maria Kevenaar, Eindhoven, NL;
Petra Elisabeth DE Jongh, Eindhoven, NL;
Robertus Adrianus Maria Wolters, Eindhoven, NL;
Pim Theo Tuyls, Eindhoven, NL;
Thomas Andreas Maria Kevenaar, Eindhoven, NL;
Petra Elisabeth De Jongh, Eindhoven, NL;
Robertus Adrianus Maria Wolters, Eindhoven, NL;
NXP B.V., Eindhoven, NL;
Abstract
The semiconductor device of the invention includes a circuit and a protecting structure. It is provided with a first and a second security element and with an input and an output. The security elements have a first and a second impedance, respectively, which impedances differ. The device is further provided with a measuring unit a processing unit and a connection unit. The processing unit transform any first information received into a specific program of measurement. Herewith a challenge-response mechanism is implemented in the device.