METHOD FOR UPDATING A SECURITY PROCESSOR, AND CORRESPONDING SYSTEM, COMPUTER PROGRAM AND SECURITY PROCESSOR

摘要

The invention relates to a method for updating a security processor and to a corresponding system, computer program and security processor. Said method for updating a security processor (16) for a decoder (14) includes a step of downloading at least one code module from a headend (6), including the sub-steps of: encrypting (32) the module by means of an encryption key and algorithm that are specific to said module; cutting (34) the module into a plurality of blocks having a size that is specific to said module; integrating (34) each one of the blocks of the module in a specific message; broadcasting (36) each one of said messages; receiving (38) said messages in the decoder (14); extracting (42) blocks of the module from said messages; decrypting (42) blocks of the module; and storing (44) blocks of the module in a memory space dedicated to said module.