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. 30, 2002
Filed:
May. 13, 1999
Applicant:
Inventors:
Didier Guerin, Caen, FR;
Constant Hardy, Clamart, FR;
Marc Girault, Caen, FR;
Marie-Josèphe Revillet, Verson, FR;
Assignee:
La Poste, Boulogne, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q 1/00 ;
U.S. Cl.
CPC ...
H04Q 1/00 ;
Abstract
A secured system of access checking using a portable storage carrier (C) on which there is recorded an electronic key (CL), a digital data processing instrument (LE) for the production of keys, and an electronic lock (L) function capable of authorizing access should the storage carrier have the requisite electronic key. To transfer an entitlement to produce keys (CL) from one production digital data processing instrument (LE) to another, it is loaded with a new public key (K′) and the signature (CER′) of this key.