公开(公告)号：US20080181410A1

公开(公告)日：2008-07-31

申请号：US12052083

申请日：2008-03-20

申请人： ALAN EDWARD BELL ,  Jeffrey Bruce Lotspiech ,  Chandler Brendan Stanton Traw

发明人： ALAN EDWARD BELL ,  Jeffrey Bruce Lotspiech ,  Chandler Brendan Stanton Traw

IPC分类号： H04L9/06

CPC分类号： G11B20/00086 ,  G11B20/00362

摘要： A system and method for enabling broadcast programs to be copied once only by consumer recorders includes writing a unique media identification on each blank disk to which content is to copied in a read-only area of the disk before it is initially recorded. Also, a one-way key management media key block is written to the disk. A content key is derived by combining a media key, derived from the media key block, with the media identification. Additionally, to facilitate copying the content one time only, an exchange key is established between the recorder and a sender such as a satellite receiver or a disk player that is associated with the recorder, and the exchange key is modified with one or more special numbers representing control commands including copy once and copy no more. The modified exchange key is then encrypted using the content key to render an encrypted modified exchange key, and the encrypted modified exchange key is then hashed with a nonce to render a bus content key. The bus content key is then used to encrypt the data for copying the data to a disk. Unauthorized attempts to copy the data after the first authorized copy has been made cannot succeed because the media ID is different on subsequent blank media. Further, if illegal clones are manufactured that can calculate the media key, new blank media can change the media key block such that the clones can no longer calculate the correct media key. Authorized players, however, can decrypt the data to display it.

摘要翻译： 仅通过消费者记录器使广播节目能够被复制一次的系统和方法包括在最初记录盘之前，将要复制内容的每个空白盘上写入唯一的媒体标识在盘的只读区域中。 此外，单向密钥管理媒体密钥块被写入磁盘。 通过将从媒体密钥块导出的媒体密钥与媒体标识组合来导出内容密钥。 此外，为了便于一次复制内容，在记录器和与记录器相关联的诸如卫星接收机或磁盘播放器的发送者之间建立交换密钥，并且交换密钥被修改为一个或多个特殊号码 代表控制命令，包括复制一次，不复制。 然后，使用内容密钥对修改的交换密钥进行加密，以呈现加密的修改的交换密钥，然后将加密的修改的交换密钥与随机数进行散列以呈现总线内容密钥。 总线内容密钥然后用于加密用于将数据复制到磁盘的数据。 未经授权的尝试在第一个授权复印件之后复制数据将无法成功，因为随后的空白介质上的介质ID不同。 此外，如果制造可以计算媒体密钥的非法克隆，则新的空白媒体可以改变媒体密钥块，使得克隆不再能够计算正确的媒体密钥。 然而，授权玩家可以解密数据以显示它。