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:
Dec. 18, 2018
Filed:
Sep. 08, 2014
Applicant:
Proton World International N.v., Zaventem, BE;
Inventors:
Jean-Louis Modave, Ottignies, BE;
Thierry Huque, Grand-Rosiere, BE;
Assignee:
Proton World International N.V., Diegem, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/08 (2006.01); G06F 21/77 (2013.01); G06F 21/79 (2013.01); G06Q 20/02 (2012.01); G06Q 20/34 (2012.01); G06Q 20/38 (2012.01); G07F 7/10 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0861 (2013.01); G06F 21/77 (2013.01); G06F 21/79 (2013.01); G06Q 20/02 (2013.01); G06Q 20/3552 (2013.01); G06Q 20/3829 (2013.01); G07F 7/10 (2013.01); G07F 7/1016 (2013.01); H04L 9/0819 (2013.01); H04L 9/0891 (2013.01); H04L 9/0894 (2013.01); G06F 2221/2137 (2013.01); H04L 2209/24 (2013.01);
Abstract
A method of obtaining, in an electronic circuit, at least one first key intended to be used in a cryptographic mechanism, on the basis of at least one second key contained in the same circuit, the first key being stored in at least one first storage element of the circuit, the first storage element being reinitialized automatically after a duration independent of the fact that the circuit is or is not powered. Also described are applications of this method to encrypted transmissions, usage controls, as well as an electronic circuit implementing these methods.