公开(公告)号：US07203311B1

公开(公告)日：2007-04-10

申请号：US09621476

申请日：2000-07-21

申请人： Raynold M. Kahn ,  Gregory J. Gagnon ,  David D. Ha ,  Peter M. Klauss ,  Christopher P. Curren ,  Thomas H. James

发明人： Raynold M. Kahn ,  Gregory J. Gagnon ,  David D. Ha ,  Peter M. Klauss ,  Christopher P. Curren ,  Thomas H. James

IPC分类号： H04L9/00

CPC分类号： H04N21/4147 ,  H04N5/76 ,  H04N5/783 ,  H04N7/163 ,  H04N7/1675 ,  H04N7/17327 ,  H04N9/8042 ,  H04N9/8205 ,  H04N21/4331 ,  H04N21/4334 ,  H04N21/4367 ,  H04N21/47202

摘要： A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. The apparatus comprises a tuner, for receiving a data stream comprising encrypted access control information and the program material encrypted according to a first encryption key, the access control information including the first encryption key; a first encryption module, communicatively coupled to the tuner and communicatively coupleable to a media storage device, for further encrypting the encrypted program material according to a second encryption key and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; a first decryption module communicatively coupleable to the media storage device, for decrypting the fourth encryption key retrieved from the media storage device using the third encryption key to produce the second encryption key, and for decrypting the further encrypted program material retrieved from the media program device to produce the encrypted program material; a conditional access module communicatively coupled to the first decryption module, for decrypting the encrypted access control information to produce the first encryption key; and a second decryption module, for decrypting the program material using the first encryption key.

摘要翻译： 公开了用于存储和检索用于后续重放的程序材料的方法和装置。 该装置包括调谐器，用于接收包括加密的访问控制信息的数据流和根据第一加密密钥加密的程序素材，所述访问控制信息包括第一加密密钥; 第一加密模块，通信地耦合到调谐器并且可通信地耦合到媒体存储设备，用于根据第二加密密钥进一步加密加密的节目素材，并且根据第三加密密钥加密第二加密密钥以产生第四加密 键; 可通信地耦合到所述媒体存储设备的第一解密模块，用于使用所述第三加密密钥解密从所述媒体存储设备检索的所述第四加密密钥以产生所述第二加密密钥，以及用于解密从所述媒体节目设备检索的所述另外加密的节目素材 生成加密程序素材; 通信地耦合到第一解密模块的条件访问模块，用于解密加密的访问控制信息以产生第一加密密钥; 以及第二解密模块，用于使用所述第一加密密钥对所述程序素材进行解密。