公开(公告)号：US20050177740A1

公开(公告)日：2005-08-11

申请号：US10775596

申请日：2004-02-09

申请人： Deirdre Athaide ,  Kevin Driver ,  Lara Lewis ,  Jeffrey Lotspiech ,  Florian Pestoni ,  Savitha Srinivasan ,  Vladimir Zbarsky

发明人： Deirdre Athaide ,  Kevin Driver ,  Lara Lewis ,  Jeffrey Lotspiech ,  Florian Pestoni ,  Savitha Srinivasan ,  Vladimir Zbarsky

IPC分类号： G06F12/14 ,  G06F21/00 ,  G11B20/00 ,  G11B20/10 ,  H04L9/32

CPC分类号： G11B20/00086 ,  G06F21/10 ,  G11B20/00347 ,  G11B20/00362 ,  G11B20/00514 ,  G11B20/00528 ,  G11B20/00855

摘要： A title key protection system includes a title key with recordable media content; storage in a repository is not required. The title key is decrypted when needed by a clearinghouse, and then re-encrypted. The title key confers rights from the content owners to the user to play and copy the content for personal use. A user downloads encrypted content from a content repository. The user's media recording device extracts an encrypted title key from the content and obtains a media key block and media ID from the physical media on which the content will be recorded. The encrypted title key, media key block, and media ID are transmitted to a clearinghouse. The clearinghouse decrypts the title key and derives a media unique key from the media key block and media ID. The clearinghouse re-encrypts the title key with the media unique key and returns this re-encrypted title key to the media recording device for recording with the content on the physical media.

摘要翻译： 标题密钥保护系统包括具有可记录媒体内容的标题密钥; 存储库中的存储不是必需的。 标题密钥在清算所需要时解密，然后重新加密。 标题密钥赋予内容所有者对用户播放和复制用于个人使用的内容的权利。 用户从内容存储库下载加密的内容。 用户的媒体记录设备从内容中提取加密的标题密钥，并从内容将被记录在物理介质上获取媒体密钥块和媒体ID。 加密的标题密钥，媒体密钥块和媒体ID被发送到结算所。 清算所解密标题密钥，并从媒体密钥块和媒体ID导出媒体唯一密钥。 票据交换所使用媒体唯一键重新加密标题密钥，并将该重新加密的标题密钥返回到媒体记录设备，以便用物理介质上的内容进行记录。