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. 19, 2002
Jacques Patarin, Versailles, FR;
Nicolas Courtois, Louveciennes, FR;
Jacques Patarin, Versailles, FR;
Nicolas Courtois, Louveciennes, FR;
Gemalto SA, Meudon, FR;
Abstract
The invention concerns an anti-pirate method for the distribution of digital content by pro-active diversified transmission, associated transmitter device and portable receiving object. The method, designed to make the same information (K) available to several receivers () belonging to a group (G) of receivers, each receiver storing information (SA) specific to it, is characterized in that it includes the following steps: define a relation K=f(K, b, SA) where (f) is a given function, (K) is information common to all the receivers, and (b) is information different for each receiver and for each value of the information (K); —enable each receiver to access information (b) before making (K) available; and transmit the information (K) to all receivers, just before making (K) available; so that each receiver can calculate information (K) using said relation.