公开(公告)号：US20210297749A1

公开(公告)日：2021-09-23

申请号：US16822734

申请日：2020-03-18

申请人： Synamedia Limited

发明人： Rotem MAROM ,  Michal Irit DEVIR ,  Tzachy Earl REINMAN

IPC分类号： H04N21/6334 ,  H04N21/235 ,  H04N21/2389 ,  H04N21/8358 ,  H04N21/436 ,  H04N21/4623 ,  H04N21/4627 ,  H04N21/41 ,  H04L9/14 ,  H04L9/08

摘要： Techniques for a smartphone-based conditional access (CA) system are described. In some embodiments, a headend in the CA system obtains a security profile associated with a pair of receiving devices used by a user, e.g., a first device (e.g., a smartphone) and a second device (e.g., a set-top-box or a TV). The headend dynamically regulates user access to requested media content during each entitlement period by assigning and distributing separate keys to the first and second device based on the security profile. The headend also uses the distributed keys to protect the media content before broadcasting. On the receiving end, one receiving device receives the media content and determines whether it is decryptable by the device. If decryptable, the receiving device (e.g., the set-top-box/TV) decrypts the media content using the keys assigned by the headend. Otherwise, the receiving device forwards the media content to the pairing device for decryption.

公开(公告)号：US20210297732A1

公开(公告)日：2021-09-23

申请号：US16822783

申请日：2020-03-18

申请人： Synamedia Limited

发明人： Rotem MAROM ,  Michal Irit DEVIR ,  Tzachy Earl REINMAN

IPC分类号： H04N21/441 ,  H04N21/4623 ,  H04N21/4385 ,  H04N21/235 ,  H04N21/266

摘要： Techniques for a smartphone-based conditional access (CA) system are described. In some embodiments, a headend in the CA system obtains a security profile associated with a pair of receiving devices used by a user, e.g., a first device (e.g., a smartphone) and a second device (e.g., a set-top-box or a TV). The headend dynamically regulates user access to requested media content during each entitlement period by assigning and distributing separate keys to the first and second device based on the security profile. The headend also uses the distributed keys to protect the media content before broadcasting. On the receiving end, one receiving device receives the media content and determines whether it is decryptable by the device. If decryptable, the receiving device (e.g., the set-top-box/TV) decrypts the media content using the keys assigned by the headend. Otherwise, the receiving device forwards the media content to the pairing device for decryption.