Patent · US Active

Hierarchization of crytographic keys in an electronic circuit

US8855314B2 · kind B2 · utility

22Cited by

0References

32Claims

0Family size

Assignee

PROTON WORLD INTERNATIONAL N.V. · BE

Inventors

Jean-Louis Modave · Ottignies, BE
Thierry Huque · Grand-Rosière-Hottomont, BE

Key dates

Filing date	Dec 31, 2008
Grant date	Oct 7, 2014
Priority date	—
Expiry date	Aug 25, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/24
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.