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.

Date of Patent:
Nov. 24, 2015

Filed:

Sep. 30, 2013
Applicant:

Infineon Technologies Ag, Neubiberg, DE;

Inventors:

Berndt Gammel, Markt-Schwaben, DE;

Tomaz Felicijan, Graz, AT;

Stefan Mangard, Munich, DE;

Assignee:

Infineon Technologies AG, Neubiberg, DE;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/71 (2013.01); G06F 21/72 (2013.01); G06F 21/44 (2013.01);
U.S. Cl.
CPC ...
G06F 21/71 (2013.01); G06F 21/445 (2013.01); G06F 21/72 (2013.01); G06F 2221/2103 (2013.01); G06F 2221/2143 (2013.01);
Abstract

A computational system is configured to protect against integrity violation. The computational system includes a processing unit and a critical resource, the critical resource being controllable by the processing unit so as to be locked or unlocked. The critical resource is configured to intermittently transmit a polling value to the processing unit, and the processing unit is configured to apply a transformation onto the polling value so as to obtain a response value and send the response value back to the critical resource. The critical resource is configured to check the response value on correctness so as to obtain a check result, and subject the controllability to a dependency on the check result.


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