公开(公告)号：EP1185023A1

公开(公告)日：2002-03-06

申请号：EP01919816.7

申请日：2001-04-06

申请人： Sony Corporation

发明人： ASANO, Tomoyuki, c/o Sony Corporation ,  OSAWA, Yoshitomo, c/o Sony Corporation ,  ISHIGURO, Ryuji, c/o Sony Corporation ,  MITSUZAWA, Atsushi, c/o Sony Corporation ,  OISHI, Tateo, c/o Sony Corporation ,  TAKI, Ryuta, c/o Sony Corporation

IPC分类号： H04L9/00 ,  G11B20/10 ,  G11B20/12

CPC分类号： G11B20/0021 ,  G11B20/00086 ,  G11B20/00115 ,  G11B20/00195 ,  G11B20/00253 ,  G11B20/00507 ,  G11B20/00528 ,  G11B20/10 ,  H04L9/0836 ,  H04L9/0891 ,  H04L2209/60

摘要： When a player cannot play back data because a master key held by the player has a generation older than the generation of a master key having been used for recording the data, or when a recorder cannot record data because a master key held by the recorder has a generation older than the generation of a master key necessary for recording to a recording medium, the user is prompted to renew the master key for acquisition of the necessary master key, thereby enabling the data playback or data recording. The renewed master key is distributed in such a form that can be processed by a specific device via a transmission medium such as a recording medium, network, IC card, telephone line, for example, via a tree-structured distribution system.

摘要翻译： 当播放器不能播放数据时，因为播放器保存的主键具有比已经用于记录数据的主密钥的生成旧的生成，或者当记录器由于记录器保持的主密钥具有记录数据时不能记录数据 比生成记录介质所必需的主密钥的代码要老一些，提示用户更新用于获取所需主密钥的主密钥，从而实现数据回放或数据记录。 更新的主密钥以例如经由树形结构的分发系统经由诸如记录介质，网络，IC卡，电话线的传输介质由特定设备处理的形式分发。