Patent ID: 7251329

Claim:
A remote control device of a requesting end user, said device comprising: means for transmitting, through a first transmission path, from a remote control device corresponding to said end user to a service provider, a public key and a request for content data; receiving means receiving through said first transmission path, a secret key encrypted by said public key from said service provider to said remote control device; decrypting means, at said remote control device, for decrypting said secret key using a private key corresponding to said public key of said end user; transmitting means, transmitting through a second transmission path, from said remote control device to a set-top box, the decrypted secret key corresponding to said service provider; and wherein the requested content data encrypted by said secret key is transmitted, through a third transmission path, from said service provider to said set-top box; and the encrypted content data is decrypted, by said set-top box, using the secret key received from the remote control device corresponding to said service provider.