ANTI-PIRATE METHOD FOR THE DISTRIBUTION OF DIGITAL CONTENT BY PRO-ACTIVE DIVERSIFIED TRANSMISSION, ASSOCIATED TRANSMITTING DEVICE AND PORTABLE RECEIVING OBJECT

摘要

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 (Kc) available to several receivers (1) belonging to a group (G) of receivers, each receiver storing information (SAi) specific to it, is characterised in that it includes the following steps: define a relation Kc=f(K, bi, SAi) where (f) is a given function, (K) is information common to all the receivers, and (bi) is information different for each receiver and for each value of the information (K);- enable each receiver to access information (bi) before making (Kc) available; and transmit the information (K) to all receivers, just before making (Kc) available; so that each receiver can calculate information (Kc) using said relation.