公开(公告)号：US20070140488A1

公开(公告)日：2007-06-21

申请号：US11641042

申请日：2006-12-19

申请人： Srinivas Dharmaji ,  Hong Jiang ,  Peter Mataga ,  Cary Torkelson ,  Edgar Villanueva

发明人： Srinivas Dharmaji ,  Hong Jiang ,  Peter Mataga ,  Cary Torkelson ,  Edgar Villanueva

IPC分类号： H04N7/167

CPC分类号： H04N7/165 ,  H04N21/4623 ,  H04N21/4627 ,  H04N21/63345 ,  H04N21/8355

摘要： A method is provided for restricting or enhancing broadcast content access on a per-subscriber basis across a population of subscribers, all of whom have a valid content access key to such content, without necessitating changes to the current standard schemes and protocols for distributing content access keys and broadcasting the traffic keys associated with the broadcast data itself, and without trusting the application that processes the data. A method of handling a multimedia broadcast in a device comprises receiving broadcast content in a media stream encrypted using a traffic key, receiving the traffic key encrypted using a session key, and receiving broadcast attributes encrypted using the traffic key and the session key, wherein use of the media stream by the device is controlled using the broadcast attributes and using an access policy in the device.

摘要翻译： 提供了一种用于限制或增强跨用户的广播内容访问的方法，所述用户群体对所有这些内容都具有有效的内容访问密钥，而不需要改变当前的用于分发内容访问的标准方案和协议 键并且广播与广播数据本身相关联的通信量，并且不信任处理数据的应用。 一种在设备中处理多媒体广播的方法包括：使用业务密钥加密的媒体流中接收广播内容，接收使用会话密钥加密的业务密钥，以及接收使用业务密钥和会话密钥加密的广播属性，其中使用 由设备使用广播属性并使用设备中的访问策略来控制设备的媒体流。