Method and system for securing communication on a home gateway in an IP content streaming system

A home gateway for communicating with a plurality of devices, said home gateway comprising:

• a secure memory inaccessible to a host processor of said home gateway;
• a security processor coupled to said secure memory, said security processor being configured to:
• recover a root-content key from said secure memory based on a key index received from a key server of a service provider for content requested by one of said plurality of devices, and
• generate a content key corresponding to said requested content utilizing said recovered root-content key;
• a scrambler configured to scramble said content utilizing said generated content key;
• and
• an interface configured to communicate said scrambled content to said one of said plurality of devices.

A home gateway for communicating with a plurality of devices, said home gateway comprising:

• an interface configured to:
• receive scrambled multimedia content from a multimedia source, and
• receive a public key of a client device and a root-content key index from a key server of a service provider,
• a secure memory inaccessible to a host processor of said home gateway, and
• a security processor coupled to said secure memory, said security processor being configured to:
• generate a content key from said secure memory based on said root-content key index,
• descramble said received scrambled multimedia content using said generated content key, and
• re-scramble said descrambled multimedia content using said public key of said client device.