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. 25, 2009
Filed:
Dec. 11, 2003
Applicants:
Benoît DE Boursetty, Paris, FR;
Laurent Frisch, Paris, FR;
Dimitri Mouton, Paris, FR;
Inventors:
Assignee:
France Telecom, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
For signing of data by a given one of M delegates mandated by N titleholders, where M≧2 and N=1 or M=1 and N≧2, the terminal of the given delegate reads in a delegation server information on the delegates and the titleholders of the group thus constituted. The data and the information read and a private key of the given delegate are applied to a cryptographic algorithm to produce a signature which therefore carries a cryptographic delegation mark. The data, information, and signature are transmitted to a user terminal that can trace the characteristics of the signature delegation.