Patent ID: 8054975
Filing Date: 2011-11-08
Classification: H04L

Abstract:
1. A method for managing a key of a home server in a system comprising a service provider, the home server, and a home device, the method comprising: receiving an authentication request of a home device; authenticating the home device depending on a verification of the home device; requesting a service provider for keys for the home device; allotting keys according to key-node corresponding information through the service provider to allot the keys to the home device, such that the home device is allotted its respective key and a key of at least one upper node that corresponds to the home device; transmitting, to the home device and a second home device, encrypted content of a desired service that is encrypted with a key of a first upper node, wherein the first upper node corresponds to an upper node of the home device and the second home device; determining to revoke the service provided to the second device; and in response to determining to revoke the service provided to the second device, transmitting, to the home device, encrypted content of the desired service that is encrypted with a key of a second upper node that corresponds to an upper node of the home device and corresponds to a lower node of the first upper node.