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. 14, 2016
Filed:
Jul. 29, 2014
Dirk Heisswolf, Munich, DE;
Andreas Ralph Pachl, Neubiberg, DE;
Alexander Stephan Schilling, Berg, DE;
Dirk Heisswolf, Munich, DE;
Andreas Ralph Pachl, Neubiberg, DE;
Alexander Stephan Schilling, Berg, DE;
FREESCALE SEMICONDUCTOR, INC., Austin, TX (US);
Abstract
A method for protecting a data item against unauthorized access and a data processing device is disclosed comprising a memory unit and a memory control unit to protect data items stored in the memory unit against prohibited access. Upon a write access the memory control unit forms a first data word comprising a data item and a first key; computes a first error-detection code; and stores the data item along with the first error-detection code. Upon a read access the memory control unit reads the data item and the first error-detection code; forms a second data word comprising the data item and a second key; computes a second error-detection code to the second data word; and determines a syndrome on the basis of the first error-detection code and the second error-detection code, wherein the syndrome is indicative of whether or not the first and second data words are identical.