Patent ID: 8307204

Claim:
A method, comprising: encrypting a multicast message by using ciphering in a multicast service control device; and sending the encrypted multicast message from the multicast service control device to a plurality of user entities, performing the ciphering using a ciphering key and at least one input parameter, wherein the input parameter comprises at least one of a subscriber related value, a service related value, a network related value for identifying a particular network and a cell related value for identifying a particular cell, and wherein the at least one input parameter is configured to restrict subscribers of a plurality of subscribers to subscribers which are allowed to decrypt the multicast message, wherein the subscriber related value comprises at least one of a group identification for identifying a group of subscribers which are allowed to receive the message or a subscriber identification for identifying a particular subscriber, and wherein the service related value comprises at least one of a service identification for identifying a service type, a sub-service identification for identifying a particular service, or a frame identification for identifying a particular data frame.