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:
Aug. 21, 2007
Filed:
Jun. 08, 2001
Nicolas Fougeroux, Le Chesnay, FR;
Patrice Hameau, Boulogne Billancourt, FR;
Benoît Bole, Versailles, FR;
Nicolas Fougeroux, Le Chesnay, FR;
Patrice Hameau, Boulogne Billancourt, FR;
Benoît Bole, Versailles, FR;
CP8 Technologies, Paris, FR;
Abstract
The invention concerns a method for secure storage of a piece of so-called sensitive data, for example an encryption key, in a memory (M) of an embedded microchip system, particularly a smart card (CP). The memory (M) comprises two physically distinct storage devices (), for example a permanent memory of the 'ROM' type (), and a second, re-programmable memory of the 'EEPROM' type (). The piece of sensitive data is divided into at least two parts (d, d'), in a given logical configuration, each of these parts being stored in one of the distinct storage devices (). An additional piece of verification data, a checksum or hash data, can also be stored in the first storage device (), at the same time as the first sensitive data part (d). The invention also concerns an embedded microchip system, particularly a smart card (CP).