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:
Apr. 08, 2008
Filed:
Jan. 15, 2003
Sébastien Canard, Caen, FR;
Marc Girault, Caen, FR;
Jacques Traore, St. Georges des Groseillers, FR;
Sébastien Canard, Caen, FR;
Marc Girault, Caen, FR;
Jacques Traore, St. Georges des Groseillers, FR;
France Telecom, Paris, FR;
Abstract
A cryptographic method and a chip card which is used to carry out the method. Before any calculation is performed by a computing means of the chip card, the chip card reads () an integral list, in a storage means of a second entity, of identifiers of first proprietary entities of a chip card. Such list is linked to each status assigned to each of the first entities by the second entity. Subsequently, the chip card compares () the identifier stored in a storage means of the chip card with the contents of the list, in order to authorize () or prohibit () any calculation by the computing means depending on the result of the comparison.