公开(公告)号：US07093128B2

公开(公告)日：2006-08-15

申请号：US09980340

申请日：2001-04-06

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Ryuji Ishiguro ,  Atsushi Mitsuzawa ,  Tateo Oishi ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Ryuji Ishiguro ,  Atsushi Mitsuzawa ,  Tateo Oishi ,  Ryuta Taki

IPC分类号： G06F1/24

CPC分类号： G11B20/0021 ,  G11B20/00086 ,  G11B20/00246 ,  G11B20/00253 ,  G11B20/10 ,  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.

公开(公告)号：US07346170B2

公开(公告)日：2008-03-18

申请号：US10204731

申请日：2001-12-21

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： H04L9/00 ,  H04K1/00

CPC分类号： H04L9/0822 ,  G11B20/00086 ,  G11B20/0021 ,  G11B20/00855 ,  H04L9/0836 ,  H04L9/0891 ,  H04L63/0428 ,  H04L63/062 ,  H04L63/0869 ,  H04L63/104 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed using an enabling key block (EKB) in association with a tree structure including category subtrees. A key tree is produced, which include subtrees that are grouped in accordance with categories and are managed by category entities. The EKB includes data produced by selecting a path in the key tree and encrypting a higher-level key in the selected path using a lower-level key in the selected path. The EKB is then provided to a device. A requester, which requests production of the EKB, may produce a root key or may request a key distribution center (KDC) to produce a root key. If the (KDC) produces the EKB, it may also request a category entity to produce a sub-EKB.

摘要翻译： 公开了一种信息处理系统和方法，其中使用与包括类别子树的树结构相关联的使能密钥块（EKB）来执行信息处理。 生成一个关键树，其中包括根据类别分组并由类别实体管理的子树。 EKB包括通过选择密钥树中的路径并使用所选路径中的较低级密钥加密所选路径中的较高级密钥而产生的数据。 然后将EKB提供给设备。 要求生产EKB的请求者可以生成根密钥，或者可以请求密钥分发中心（KDC）产生根密钥。 如果（KDC）生成EKB，它也可以请求类别实体来生成子EKB。

公开(公告)号：US20050228809A1

公开(公告)日：2005-10-13

申请号：US11132664

申请日：2005-05-19

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： G06F12/14 ,  G06F12/00 ,  G06F21/62 ,  G11B20/00 ,  H04L9/00 ,  H04L9/08 ,  H04N7/167 ,  G06F17/30

CPC分类号： G06F21/10 ,  G06F2221/0755 ,  G06F2221/0771 ,  G06F2221/2107 ,  G11B20/00086 ,  G11B20/0021 ,  H04L9/0822 ,  H04L9/0836 ,  H04L9/0891 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is formed so as to include a plurality of subtrees serving as category trees categorized in accordance with categories and managed by category entities. An EKB includes data produced by selecting a path in a tree and encrypting a higher-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. Distribution of EKB's is managed on the basis of an EKB type definition list representing the correspondence between an EKB type identifier and one or more identification data identifying one or more category trees that can process an EKB of an EKB type specified by the EKB type identifier.

摘要翻译： 公开了一种信息处理系统和方法，其中使用基于包括类别子树的树结构的启用密钥块（EKB）以高效的方式执行信息处理。 形成关键树，以便包括用作根据类别分类并由类别实体管理的类别树的多个子树。 EKB包括通过选择树中的路径并使用所选路径中的较低级别的密钥来加密所选路径中的较高级别的密钥而产生的数据。 所得到的EKB被提供给设备。 基于表示EKB类型标识符与识别可以处理由EKB类型标识符指定的EKB类型的EKB的一个或多个类别树的一个或多个标识数据之间的对应关系的EKB类型定义列表来管理EKB的分发。

公开(公告)号：US20070098177A1

公开(公告)日：2007-05-03

申请号：US11639711

申请日：2006-12-15

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： H04L9/00

CPC分类号： H04L63/0428 ,  G06F21/10 ,  G06F2221/0753 ,  G11B20/00086 ,  G11B20/0021 ,  G11B20/00855 ,  H04L9/0836 ,  H04L9/0891 ,  H04L63/062 ,  H04L63/0869 ,  H04L63/104 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is produced so as to include a plurality of subtrees that are grouped in accordance with categories and managed by category entities. An EKB is produced so as to include data produced by selecting a path in the key tree and encrypting an upper-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. If a change occurs in state of a category tree capable of processing an EKB identified in the EKB type definition list, a notification of the change in state is sent to an entity that uses the EKB thereby making it possible for an EKB requester to perform processing in accordance with a newest EKB.

公开(公告)号：US06911974B2

公开(公告)日：2005-06-28

申请号：US10204514

申请日：2001-12-21

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： G06F12/14 ,  G06F12/00 ,  G06F21/62 ,  G11B20/00 ,  H04L9/00 ,  H04L9/08 ,  H04N7/167 ,  G09G5/00

CPC分类号： G06F21/10 ,  G06F2221/0755 ,  G06F2221/0771 ,  G06F2221/2107 ,  G11B20/00086 ,  G11B20/0021 ,  H04L9/0822 ,  H04L9/0836 ,  H04L9/0891 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is formed so as to include a plurality of subtrees serving as category trees categorized in accordance with categories and managed by category entities. An EKB including data produced by selecting a path in a tree and encrypting a higher-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. Distribution of EKB's is managed on the basis of an EKB type definition list representing the correspondence between an EKB type identifier and one or more identification data identifying one or more category trees that can process an EKB of an EKB type specified by the EKB type identifier.

摘要翻译： 公开了一种信息处理系统和方法，其中使用基于包括类别子树的树结构的启用密钥块（EKB）以高效的方式执行信息处理。 形成关键树，以便包括用作根据类别分类并由类别实体管理的类别树的多个子树。 EKB包括通过选择树中的路径并使用所选路径中的较低级别的密钥加密所选路径中的较高级的密钥而产生的数据。 所得到的EKB被提供给设备。 基于表示EKB类型标识符与识别可以处理由EKB类型标识符指定的EKB类型的EKB的一个或多个类别树的一个或多个标识数据之间的对应关系的EKB类型定义列表来管理EKB的分发。

公开(公告)号：US07405731B2

公开(公告)日：2008-07-29

申请号：US11132664

申请日：2005-05-19

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： G09G5/00

CPC分类号： G06F21/10 ,  G06F2221/0755 ,  G06F2221/0771 ,  G06F2221/2107 ,  G11B20/00086 ,  G11B20/0021 ,  H04L9/0822 ,  H04L9/0836 ,  H04L9/0891 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is formed so as to include a plurality of subtrees serving as category trees categorized in accordance with categories and managed by category entities. An EKB includes data produced by selecting a path in a tree and encrypting a higher-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. Distribution of EKB's is managed on the basis of an EKB type definition list representing the correspondence between an EKB type identifier and one or more identification data identifying one or more category trees that can process an EKB of an EKB type specified by the EKB type identifier.

摘要翻译： 公开了一种信息处理系统和方法，其中使用基于包括类别子树的树结构的启用密钥块（EKB）以高效的方式执行信息处理。 形成关键树，以便包括用作根据类别分类并由类别实体管理的类别树的多个子树。 EKB包括通过选择树中的路径并使用所选路径中的较低级别的密钥来加密所选路径中的较高级别的密钥而产生的数据。 所得到的EKB被提供给设备。 基于表示EKB类型标识符与识别可以处理由EKB类型标识符指定的EKB类型的EKB的一个或多个类别树的一个或多个标识数据之间的对应关系的EKB类型定义列表来管理EKB的分发。

公开(公告)号：US07167564B2

公开(公告)日：2007-01-23

申请号：US10204775

申请日：2001-12-21

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： H04L9/16

CPC分类号： H04L63/0428 ,  G06F21/10 ,  G06F2221/0753 ,  G11B20/00086 ,  G11B20/0021 ,  G11B20/00855 ,  H04L9/0836 ,  H04L9/0891 ,  H04L63/062 ,  H04L63/0869 ,  H04L63/104 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is produced so as to include a plurality of subtrees that are grouped in accordance with categories and managed by category entities. An EKB is produced so as to include data produced by selecting a path in the key tree and encrypting an upper-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. If a change occurs in state of a category tree capable of processing an EKB identified in the EKB type definition list, a notification of the change in state is sent to an entity that uses the EKB thereby making it possible for an EKB requester to perform processing in accordance with a newest EKB.

摘要翻译： 公开了一种信息处理系统和方法，其中使用基于包括类别子树的树结构的启用密钥块（EKB）以高效的方式执行信息处理。 生成密钥树，以便包括根据类别分组并由类别实体管理的多个子树。 产生EKB，以包括通过选择密钥树中的路径并使用所选路径中的下级密钥加密所选路径中的上级密钥而产生的数据。 所得到的EKB被提供给设备。 如果在能够处理在EKB类型定义列表中识别的EKB的类别树的状态发生变化，则向使用EKB的实体发送状态改变的通知，从而使得EKB请求者能够执行处理 按照最新的EKB。

公开(公告)号：US07738662B2

公开(公告)日：2010-06-15

申请号：US11639711

申请日：2006-12-15

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Tateo Oishi ,  Ryuji Ishiguro ,  Ryuta Taki

IPC分类号： H04L9/16

CPC分类号： H04L63/0428 ,  G06F21/10 ,  G06F2221/0753 ,  G11B20/00086 ,  G11B20/0021 ,  G11B20/00855 ,  H04L9/0836 ,  H04L9/0891 ,  H04L63/062 ,  H04L63/0869 ,  H04L63/104 ,  H04L2209/60

摘要： An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is produced so as to include a plurality of subtrees that are grouped in accordance with categories and managed by category entities. An EKB is produced so as to include data produced by selecting a path in the key tree and encrypting an upper-level key in the selected path using a lower-level key in the selected path. The resultant EKB is provided to a device. If a change occurs in state of a category tree capable of processing an EKB identified in the EKB type definition list, a notification of the change in state is sent to an entity that uses the EKB thereby making it possible for an EKB requester to perform processing in accordance with a newest EKB.

摘要翻译： 公开了一种信息处理系统和方法，其中使用基于包括类别子树的树结构的启用密钥块（EKB）以高效的方式执行信息处理。 生成密钥树，以便包括根据类别分组并由类别实体管理的多个子树。 产生EKB，以包括通过选择密钥树中的路径并使用所选路径中的下级密钥加密所选路径中的上级密钥而产生的数据。 所得到的EKB被提供给设备。 如果在能够处理在EKB类型定义列表中识别的EKB的类别树的状态发生变化，则向使用EKB的实体发送状态改变的通知，从而使得EKB请求者能够执行处理 按照最新的EKB。

公开(公告)号：US07346169B2

公开(公告)日：2008-03-18

申请号：US10069176

申请日：2001-06-21

申请人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Ryuji Ishiguro ,  Atsushi Mitsuzawa ,  Tateo Oishi

发明人： Tomoyuki Asano ,  Yoshitomo Osawa ,  Ryuji Ishiguro ,  Atsushi Mitsuzawa ,  Tateo Oishi

IPC分类号： H09L9/14

CPC分类号： H04L9/0836 ,  G06F21/10 ,  G06F2221/2107 ,  G11B20/00086 ,  G11B20/00115 ,  G11B20/00195 ,  G11B20/0021 ,  G11B20/00253 ,  G11B20/00507 ,  G11B20/00528 ,  G11B20/00855 ,  H04L9/0822 ,  H04L9/0891 ,  H04L63/0428 ,  H04L63/064 ,  H04L63/12 ,  H04L2209/60

摘要： An information processing device, information processing method and a recording medium are provided. Storage included in the information processing device is operable to store a node key and a leaf key, the leaf key being unique to the information processing device and the node key being unique to each node of a hierarchical network of nodes having a hierarchical tree structure. A decryption processor performs decryption processing to detect whether an encrypted decryption key for decrypting encrypted data is stored in at least one of on the information processing device or on a recording medium. When the encrypted decryption key is detected, the decryption processor is operable to calculate the decryption key by decrypting the encrypted decryption key. However, when the encrypted decryption key is not detected, the decryption processor is operable to calculate the decryption key by decrypting a key block using one of the one or more node keys stored in the storage and the leaf key stored in the storage. The calculated decryption key may then be encrypted and stored by the decryption processor on at least one of the recording medium or the memory.

摘要翻译： 提供信息处理装置，信息处理方法和记录介质。 包含在信息处理装置中的存储器可操作以存储节点密钥和叶子密钥，叶信息对于信息处理设备是唯一的，节点密钥对于具有分层树结构的分层网络的每个节点是唯一的。 解密处理器执行解密处理，以检测用于解密加密数据的加密解密密钥是否存储在信息处理装置或记录介质中的至少一个中。 当检测到加密的解密密钥时，解密处理器可操作以通过解密加密的解密密钥来计算解密密钥。 然而，当未检测到加密的解密密钥时，解密处理器可操作以通过使用存储在存储器中的一个或多个节点密钥和存储在存储器中的叶子密钥中的一个来解密密钥块来计算解密密钥。 所计算的解密密钥然后可以由解密处理器加密并存储在记录介质或存储器中的至少一个上。

公开(公告)号：US20060159272A1

公开(公告)日：2006-07-20

申请号：US11342162

申请日：2006-01-27

申请人： Ryuji Ishiguro ,  Yoshitomo Osawa ,  Tateo Oishi ,  Tomoyuki Asano ,  Atsushi Mitsuzawa

发明人： Ryuji Ishiguro ,  Yoshitomo Osawa ,  Tateo Oishi ,  Tomoyuki Asano ,  Atsushi Mitsuzawa

IPC分类号： H04L9/00

CPC分类号： G11B20/00086 ,  G06F21/10 ,  G06F2221/0797 ,  G06F2221/2109 ,  G11B20/0021 ,  H04L9/0836 ,  H04L9/0891

摘要： An enabling key block (EKB) used in an encrypted key distributing tree structure is generated by forming a simplified 2-branch or multi-branch type tree with a terminal node or leaf which is capable of decrypting on the basis of a key corresponding to a node or a leaf of the simplified tree. Further, the EKB includes a tag for indicating a position of an encrypted key in the tree. The tag not only discriminates position but also stores data for judging the presence of encrypted key data within the EKB. As such, a considerable reduction in data quantity is realized, and the decrypting process in a device is also simplified.

摘要翻译： 在加密的密钥分发树结构中使用的启用密钥块（EKB）通过形成具有终端节点或叶片的简化的2分支或多分支树型树生成，该终端节点或叶片能够基于对应于 节点或简化树的叶。 此外，EKB包括用于指示加密密钥在树中的位置的标签。 该标签不仅识别位置，还存储用于判断EKB内加密密钥数据的存在的数据。 因此，实现了数据量的显着减少，并且设备中的解密处理也被简化。