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:
Mar. 02, 2010
Filed:
Dec. 20, 2002
David Arditti Modiano, Clamart, FR;
Sébastien Canard, Caen, FR;
Marc Girault, Caent, FR;
Jacques Traore, Flers, FR;
David Arditti Modiano, Clamart, FR;
Sébastien Canard, Caen, FR;
Marc Girault, Caent, FR;
Jacques Traore, Flers, FR;
France Telecom, Paris, FR;
Abstract
The invention concerns a system enabling a member (M) of a group (G) to produce, by means of customized data (z; K), a message (m) accompanied by a signature () proving to a verifier that the message originates from a member of the group (G). The invention is characterized in that the customized data is in the form of an electronic physical medium (). Advantageously, the latter also incorporates: encrypting means (B) for producing a customized cipher (C) from the customized data prior to the signature S of the message (m), means (B) for producing a combination of a message m to be signed and the cipher (C) associated with said message, for example in the form of a concatenation of the message (m) with the cipher (C), and means (B) for signing (Sig) the message (m) with the customized data (z; K) in the form of a cipher (C) associated with said message. Advantageously, the physical medium is a smart card () or the like.