Patent ID: 8037491

Claim:
A method of transmitting data from a transmission apparatus to one of a plurality of receiving terminals, comprising: communicating between said one receiving terminal and the transmission apparatus via an Internet system, said one receiving terminal being operable to receive a digital broadcasting signal; receiving authentication data associated with said one receiving terminal; authenticating said authentication data; upon authenticating, converting unique terminal information identifying said one receiving terminal as a destination of transmission into converted unique terminal information comprising a key ID, said unique terminal identification information being selected in a manner unrelated to said authentication data, and said key ID being an encoded version of said unique terminal identification information; transmitting said key ID, an update program to change the processing of said one receiving terminal, and a download application to said one receiving terminal, said key ID being storable in a storage location of the receiving terminal so that the stored key ID is not recognizable as said encoded version of said unique terminal identification information; executing said download application at said one receiving terminal to obtain an inputted key ID; comparing said inputted key ID with said transmitted key ID to validate said inputted key ID; upon validation of said inputted key ID, updating the processing of said one receiving terminal, said updating comprising: returning said converted unique terminal information comprising said key ID to said unique terminal information by decoding said key ID, installing said unique terminal information on a device of said one receiving terminal, and executing said update program on said device of said one receiving terminal.