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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.:

US 8812855 B1

PDFFull Text
Date of Patent:
Aug. 19, 2014

Filed:

Mar. 01, 2010

Software protection

Applicant:

Hugues DE Perthuis, Garcelles, FR;

Inventor:

Hugues de Perthuis, Garcelles, FR;

Assignee:

NXP B.V., Eindhoven, NL;

Attorney:
Primary Examiner:

Madhuri Herzog

Int. Cl.
CPC ...
G06F 21/00 (2013.01); G06F 21/64 (2013.01); G06F 21/12 (2013.01); G06F 21/51 (2013.01); H04L 29/06 (2006.01); H04L 9/06 (2006.01); G06F 9/30 (2006.01); G06F 21/54 (2013.01); G06F 21/50 (2013.01); G06F 21/60 (2013.01);
U.S. Cl.
CPC ...
G06F 21/64 (2013.01); G06F 21/12 (2013.01); G06F 21/125 (2013.01); G06F 21/51 (2013.01); G06F 21/50 (2013.01); H04L 63/12 (2013.01); H04L 9/0643 (2013.01); G06F 21/60 (2013.01); H04L 63/123 (2013.01); G06F 9/30145 (2013.01); G06F 9/3017 (2013.01); G06F 21/54 (2013.01);
Abstract

A program (MC), which can be executed by a programmable circuit, is protected in the following manner. An instruction block (IB) is provided on the basis of at least a portion (MC-P) of the program. A protective code (DS) is generated that has a predefined relationship with the instruction block (IB). The instruction block (IB) is analyzed (ANL) so as to identify free ranges (FI) within the instruction block that are neutral with respect to an execution of the instruction block. The free ranges comprise at least one of the following types: bit ranges and value ranges. The free ranges that have been identified are used for embedding (SEB) the protective code (DS) within the instruction block (IB).

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