公开(公告)号：US06883097B1

公开(公告)日：2005-04-19

申请号：US09575740

申请日：2000-05-22

申请人： Jeffrey Bruce Lotspiech ,  Ariel Virgil Mirles ,  Dalit Naor ,  Sigfredo Ismael Nin

发明人： Jeffrey Bruce Lotspiech ,  Ariel Virgil Mirles ,  Dalit Naor ,  Sigfredo Ismael Nin

IPC分类号： H04H20/00 ,  H04L9/00 ,  H04L9/08 ,  H04N7/16 ,  H04N7/167 ,  H04N21/258 ,  H04N21/266

CPC分类号： H04N7/163 ,  G11B20/00362 ,  H04L9/0861 ,  H04L9/14 ,  H04L2209/34 ,  H04L2209/606 ,  H04N7/1675 ,  H04N21/2585 ,  H04N21/26613

摘要： A system for protecting content on recordable media for, e.g., DVD audio disks, flash memory media, or other media includes providing a media key block (MKB) on each media, with each MKB including 25,000 encryptions of a media key by 25,000 or so device keys. Each authorized player in the system has a single device key from among the system device keys with which to decrypt the media key. To avoid a coincidence attack in which a hacker can learn the MKB and associated media key and then guess at a device key without knowing its position in the MKB, the media key is XORed with a number representing each position in the MKB, and only then encrypted with the device key corresponding to that position.

摘要翻译： 用于保护例如DVD音频盘，闪存介质或其他媒体的可记录媒体上的内容的系统包括在每个媒体上提供媒体密钥块（MKB），每个MKB包括25,000个媒体密钥的25,000个加密 设备密钥。 系统中的每个授权的播放器具有用于解密媒体密钥的系统设备密钥中的单个设备密钥。 为了避免黑客可以学习MKB和相关媒体密钥的巧合攻击，然后在不知道其在MKB中的位置的情况下猜测设备密钥，则将媒体密钥与表示MKB中每个位置的数字进行异或， 用与该位置对应的设备密钥加密。