FIELD: data encoding and encoded data transfer over data network.
SUBSTANCE: proposed method intended to prevent decoding of key file for data product stored in memory database (DB) or STB decoder provided with safety module (SM) includes extraction of data to be sent to memory database (DB)from encoded data stream and re-encoding of these data before sending them to memory using for the purpose at least one unique key (K1, K2).
EFFECT: enhanced safety of encoded data in storage.
7 cl, 3 dwg
