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. 23, 2010
Filed:
Jan. 14, 2004
Carl J. Knudsen, Gilbert, AZ (US);
Carl J. Knudsen, Gilbert, AZ (US);
NXP B.V., Eindhoven, NL;
Abstract
A tamper-resistant packaging approach protects an integrated circuit () from undesirable access. According to an example embodiment of the present invention, data is encrypted as a function of the state of a plurality of magnetically-responsive circuit elements (-) and then decrypted as a function of the state (-). A package () is arranged to prevent access to the integrated circuit and having magnetic particles (-) therein. The magnetic particles (-) are arranged to cause the magnetically-responsive circuit elements (-) to take on a state that is used to encrypt the data. The state of these elements is again accordingly used to decrypt the data (e.g., as a key). When the magnetic particles are altered, for example, by removing a portion of the package, the state of one or more of the magnetically-responsive circuit elements is changed, thus rendering the state incapable of being used for decrypting the data.