Patent ID: 7769177
Filing Date: 2010-08-03
Classification: H04H,H04L

Abstract:
1. A method of digital rights management for a broadcast-multicast service, the method performed by a terminal and comprising: performing a registration procedure with a network, a public key of the terminal being shared during the registration procedure performed via a broadcast channel or interaction channel; sending, to the network, a request message to join a service domain that corresponds to a service bundle comprising a plurality of services which share a common domain key; receiving, from the network, the common domain key for the service bundle, the common domain key having been encrypted by using the public key; receiving, from the network, a service domain RO (Rights Object) including a plurality of Service Encryption Keys (SEKs), each SEK being encrypted by the received common domain key, and the service domain RO being broadcast via the broadcast channel or directly transmitted via the interaction channel to a plurality of terminals that joined the service domain; receiving, from the network, a Traffic Encryption Key (TEK) being encrypted by using one of the plurality of SEKs, the TEK being broadcast via the broadcast channel or directly transmitted via the interaction channel; and receiving, from the network, service data of the broadcast-multicast service, the service data being encrypted by using the TEK.