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