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. 31, 2013
Filed:
May. 31, 2005
Sander Matthijs Rijnswou Van, Veldhoven, NL;
Jan Rene Brands, Nijmegen, NL;
Sander Matthijs Rijnswou Van, Veldhoven, NL;
Jan Rene Brands, Nijmegen, NL;
NXP B.V., Eindhoven, NL;
Abstract
An authentication system includes a plurality of electronic tags () that are each associated with a respective unique identity ID. The tags include a memory () with a first memory location () for storing a pre-computed challenge and a second memory location () for storing a pre-computed response that is associated with the challenge. The first memory location () is non-readable from outside the tag. An access circuit () only provides the response after having received a challenge that matches the challenge stored in the first memory location. A reader station () obtains the identity associated with a tag. It then determines a corresponding challenge and sends the challenge to the tag. It receives a response from the tag and verifies the authenticity of the tag by comparing the received response to a response that corresponds to the challenge.