BigPatents India

The invention concerns a method for transmitting conditional access content whereby said content is broadcast as data packets (DP). Said data packets contain at least one marker having a known value and a payload (PL). The method includes the following steps: extracting said marker (Mc) from the data packet (DP) and substituting said marker with an identification information (PAR) of an encryption key; encrypting said payload (PL) with an encryption key (K1) identifiable with said identification information (PAR) of an encryption key; forming an encrypted data packet containing at least said identification information (PAR) of an encryption key and the encrypted payload (PLK1); transmitting said encrypted data packet to at least one receiver. No. of Pages : 13 No. of Claims : 9