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. 31, 2015
Filed:
Apr. 01, 2004
Applicants:
Stéphan Courcambeck, Saint Cyr sur Mer, FR;
Claude Anguille, Banc Bel Air, FR;
Inventors:
Stéphan Courcambeck, Saint Cyr sur Mer, FR;
Claude Anguille, Banc Bel Air, FR;
Assignee:
STMicroelectronics SA, Montrouge, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); G06F 12/14 (2006.01); G06F 21/53 (2013.01); G06F 21/62 (2013.01);
U.S. Cl.
CPC ...
G06F 12/1475 (2013.01); G06F 21/53 (2013.01); G06F 21/6218 (2013.01);
Abstract
A method for authorizing an access to a table of address correspondence between a multitask CPU and at least one memory containing several programs, consisting of calculating, on each task change of the CPU, a signature of at least part of the program instruction lines, and checking the conformity of this signature with a signature recorded upon previous execution of the involved program.