Patent ID: 7397921
Filing Date: 2008-07-08
Classification: H04H,H04N

Abstract:
1. A receiving apparatus, comprising: a demultiplexer that separates a multiplexed signal containing first encrypted data into at least the first encrypted data and program-specific information; a tool list demultiplexor that separates a tool list having a tool identification indicating a decoding tool for decrypting the first encrypted data from the multiplexed signal; a control graph demultiplexor that separates a control graph indicating an instantiated location of the decoding tool in the receiving apparatus from the multiplexed signal; a rights information demultiplexor that demultiplexes rights information for the first encrypted data from the multiplexed signal, the rights information specifying at least one of rights for a permitted number of accesses and rights for editing in the receiving apparatus; a first controller that acquires a tool according to the tool identification acquired from the tool list, and instantiating the tool according to the control graph; a first rights manager that processes the first encrypted data according to the rights information; a second rights manager that separates the rights information into first rights information and second rights information; and a multiplexing adjustor that modifies the rights information in the multiplexed signal, and that outputs a revised multiplexed signal, wherein the revised multiplexed signal is output to a second receiving apparatus in accordance with a request signal from the second receiving apparatus.