Method and system for secure system-on-a-chip architecture for multimedia data processing

A non-transitory machine-readable storage having stored thereon, a computer program having a code section for enabling a multimedia routing path in a single-chip integrated system, the code section being executable by a machine for causing the machine to:

• configure by a processor within the single-chip integrated system, a subsystem of a plurality of subsystems in the single-chip integrated system by writing to a configuration register via an unsecured bus to select an input source and an output destination for the subsystem;
• validate the selected input source and the selected output destination for the subsystem by writing to a security register by a security processor within the single-chip integrated system via a secure bus that is different from the unsecured bus;
• and
• write to the secure register to indicate whether the processor or the security processor is allowed to load descrambling keys into the key memory,
• wherein the subsystem comprises a descrambling block.

A single-chip integrated system for enabling a multimedia routing path, the system comprising:

• a processor configured to configure a subsystem of a plurality of subsystems within the single-chip integrated system by writing to a configuration register via an unsecured bus to select an input source and an output destination for the subsystem;
• a key memory;
• and
• a security processor configured to validate the selected input source and the selected output destination for the subsystem by writing to a security register within the single-chip integrated system via a secure bus that is different from the unsecured bus and to write to the secure register to indicate whether the processor or the security processor is allowed to load descrambling keys into the key memory,
• wherein the subsystem comprises a descrambling block.