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1.发明授权System, method, and service for performing unified broadcast encryption and traitor tracing for digital content 有权用于执行数字内容的统一广播加密和叛逆追踪的系统，方法和服务公开(公告)号：US08121287B2
公开(公告)日：2012-02-21
申请号：US12133736
申请日：2008-06-05
IPC分类号： H04K1/04
CPC分类号： H04L9/32 , G06F21/10 , G09C5/00 , G11B20/00086 , G11B20/00137 , G11B20/0021 , G11B20/00362 , G11B20/00427 , G11B20/00507 , H04H60/18 , H04H60/23 , H04L9/0822 , H04L2209/606 , H04N21/23476 , H04N21/26613 , H04N21/42646 , H04N21/44055 , H04N21/8456
摘要： A unified broadcast encryption system divides a media key tree into S subtrees, divides digital content into segments, and converts some of the segments into variations; the number of segments and variations is q. The system subdivides each of the subtrees into q/|S| subdivided subtrees, assigns a key media variant to each of the subdivided subtrees, and generates a unified media key block (MKBu). The system decrypts digital content by obtaining required key media variants from the MKBu, using the key media variant to find an entry in a variant key table, decrypt a title key, and locate a variant number from the variant key table. The system uses the variant number to identify which of the variations may be decrypted by the title key and uses the title key to decrypt segments and variations.
摘要翻译： 统一广播加密系统将媒体密钥树划分为S子树，将数字内容划分为多个段，并将其中的一些段转换为变体; 段数和变化数为q。 系统将每个子树细分为q / | S | 细分子树，将关键媒体变体分配给每个细分子树，并生成统一的媒体关键块（MKBu）。 该系统通过从MKBu获得所需的密钥介质变体来解密数字内容，使用密钥介质变体来找到变体密钥表中的条目，解密标题密钥以及从变体密钥表中定位变体号。 系统使用变体号来标识哪个变体可以由标题密钥解密，并使用标题密钥来解密段和变体。
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2.发明申请SYSTEM, METHOD, AND SERVICE FOR PERFORMING UNIFIED BROADCAST ENCRYPTION AND TRAITOR TRACING FOR DIGITAL CONTENT 有权用于执行统一的广播加密的系统，方法和服务以及用于数字内容的TRAITOR跟踪公开(公告)号：US20090323936A1
公开(公告)日：2009-12-31
申请号：US12133736
申请日：2008-06-05
IPC分类号： H04L9/00
CPC分类号： H04L9/32 , G06F21/10 , G09C5/00 , G11B20/00086 , G11B20/00137 , G11B20/0021 , G11B20/00362 , G11B20/00427 , G11B20/00507 , H04H60/18 , H04H60/23 , H04L9/0822 , H04L2209/606 , H04N21/23476 , H04N21/26613 , H04N21/42646 , H04N21/44055 , H04N21/8456
摘要： A unified broadcast encryption system divides a media key tree into S subtrees, divides digital content into segments, and converts some of the segments into variations; the number of segments and variations is q. The system subdivides each of the subtrees into q/|S| subdivided subtrees, assigns a key media variant to each of the subdivided subtrees, and generates a unified media key block (MKBu). The system decrypts digital content by obtaining required key media variants from the MKBu, using the key media variant to find an entry in a variant key table, decrypt a title key, and locate a variant number from the variant key table. The system uses the variant number to identify which of the variations may be decrypted by the title key and uses the title key to decrypt segments and variations.
摘要翻译： 统一广播加密系统将媒体密钥树划分为S子树，将数字内容划分为多个段，并将其中的一些段转换为变体; 段数和变化数为q。 系统将每个子树细分为q / | S | 细分子树，将关键媒体变体分配给每个细分子树，并生成统一的媒体关键块（MKBu）。 该系统通过从MKBu获得所需的密钥介质变体来解密数字内容，使用密钥介质变体来在变式密钥表中找到条目，解密标题密钥以及从变体密钥表中定位变体号。 系统使用变体号来标识哪个变体可以由标题密钥解密，并使用标题密钥来解密段和变体。
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