公开(公告)号：AT356484T

公开(公告)日：2007-03-15

申请号：AT01272281

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  G06F21/00 ,  G06F21/10 ,  G06F21/62 ,  G06Q30/06 ,  G06Q50/00 ,  G06Q50/10 ,  G11B20/00 ,  H04L9/08 ,  H04L29/06 ,  H04N7/167 ,  H04L9/00 ,  G11B20/10 ,  G10K15/02

Abstract: 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, and 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：DE60127096T2

公开(公告)日：2007-11-08

申请号：DE60127096

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  H04L9/00 ,  G06F21/00 ,  G06F21/10 ,  G06F21/62 ,  G06Q30/06 ,  G06Q50/00 ,  G06Q50/10 ,  G10K15/02 ,  G11B20/00 ,  G11B20/10 ,  H04L9/08 ,  H04L29/06 ,  H04N7/167

Abstract: 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, and 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：HK1058269A1

公开(公告)日：2004-05-07

申请号：HK03109357

申请日：2003-12-23

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  G06F21/00 ,  G06F21/10 ,  G06F21/62 ,  G06Q30/06 ,  G06Q50/00 ,  G06Q50/10 ,  G11B20/00 ,  H04L9/08 ,  H04L29/06 ,  H04N7/167 ,  H04L ,  G06F

Abstract: 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, and 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：EP1253738A4

公开(公告)日：2005-02-02

申请号：EP01272279

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  G06F12/00 ,  G06F21/62 ,  G11B20/00 ,  H04L9/00 ,  H04L9/08 ,  H04N7/167 ,  G10K15/02 ,  G11B20/10

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

Abstract: An information processing system and method for realizing an efficient processing by using an enabling key block (EKB) of a categorized tree structure. A path constituting a key tree having sub-trees sorted by category and managed by a category entity is selected, and an EKB composed of encrypted data on an upper-level key encrypted by a lower-level key on the selected path is created and provided to a device. The issuance of an EKB is managed with reference to an EKB type definition list where an EKB type identifier is related to identification data on one or more EKB-processable category trees.

公开(公告)号：EP1370023A4

公开(公告)日：2010-12-15

申请号：EP03701032

申请日：2003-01-09

Applicant: SONY CORP

Inventor： TAKI RYUTA

IPC: G06F12/14 ,  H04L9/08 ,  G06F13/00 ,  G06F15/00 ,  G06F21/00 ,  G06F21/10 ,  G06F21/24 ,  G06F21/64 ,  H04L9/32 ,  H04L29/06 ,  H04N5/913 ,  H04N7/173

CPC classification number: H04L63/18 ,  G06F21/10 ,  H04L63/08 ,  H04L2463/101 ,  H04N5/913 ,  H04N7/17318 ,  H04N21/25816 ,  H04N21/41407 ,  H04N21/4143 ,  H04N21/47202 ,  H04N21/63345 ,  H04N21/6581 ,  H04N2005/91364

公开(公告)号：AT444616T

公开(公告)日：2009-10-15

申请号：AT01272280

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  H04L9/00 ,  G06F21/00 ,  G06F21/10 ,  G06F21/62 ,  G10K15/02 ,  G11B20/00 ,  G11B20/10 ,  H04L9/08 ,  H04L29/06 ,  H04N7/167

Abstract: An information processing system and method for realizing efficient processing using an enabling key block (EKB) using a categorized tree structure. An EKB composed of encrypting data for encrypting an upper-order key by using a lower-order key on a selection path of a key tree having sub-trees managed by a category entity is created and provided to a device. When a request to create an EKB is made, a structure for creating a route key by itself or a structure for requesting a key distribution center to create a route key is selectively executed. Further a structure for requesting a category entity to create a sub-EKB when the EKB distribution center creates an EKB is provided, and therefore the EKB creation and management are made efficient.

公开(公告)号：AT419691T

公开(公告)日：2009-01-15

申请号：AT06076195

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  H04L9/00 ,  G06F21/00 ,  G06F21/10 ,  G06F21/62 ,  G06Q30/06 ,  G06Q50/00 ,  G06Q50/10 ,  G10K15/02 ,  G11B20/00 ,  G11B20/10 ,  H04L9/08 ,  H04L29/06 ,  H04N7/167

Abstract: 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, and 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：AT373357T

公开(公告)日：2007-09-15

申请号：AT01272279

申请日：2001-12-21

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  OISHI TATEO ,  ISHIGURO RYUJI ,  TAKI RYUTA

IPC: G06F12/14 ,  H04L9/00 ,  G06F12/00 ,  G06F21/62 ,  G10K15/02 ,  G11B20/00 ,  G11B20/10 ,  H04L9/08 ,  H04N7/167

Abstract: 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.

公开(公告)号：AU4685701A

公开(公告)日：2001-10-23

申请号：AU4685701

申请日：2001-04-06

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  ISHIGURO RYUJI ,  MITSUZAWA ATSUSHI ,  OISHI TATEO ,  TAKI RYUTA

IPC: G06F12/14 ,  G06F21/24 ,  G09C1/00 ,  G11B20/00 ,  G11B20/10 ,  G11B27/00 ,  H04L9/08 ,  H04L9/32 ,  H04N5/91 ,  H04L9/00 ,  G11B20/12

Abstract: 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：CA2372552A1

公开(公告)日：2001-10-18

申请号：CA2372552

申请日：2001-04-06

Applicant: SONY CORP

Inventor： ASANO TOMOYUKI ,  OSAWA YOSHITOMO ,  ISHIGURO RYUJI ,  MITSUZAWA ATSUSHI ,  OISHI TATEO ,  TAKI RYUTA

IPC: G06F12/14 ,  G06F21/24 ,  G09C1/00 ,  G11B20/00 ,  G11B20/10 ,  G11B27/00 ,  H04L9/08 ,  H04L9/32 ,  H04N5/91 ,  H04L9/00 ,  G11B20/12

Abstract: If the generation of a master key that a reproducing apparatus has is older than that used when data is recorded and consequently the data cannot be reproduced, or if the generation of a master key that a recording apparatus has is older than that required when data is to be recorded on a record medi um and consequently the data cannot be recorded, the user is prompted to update the master key, and the user acquires a required master key to perform reproducing or recording. the updated master key is delivered in the form handled only by a specific device through a transmission medium such as a record medium, a network, an IC card, or a telephone line by using, e.g., a tree-structured key delivery system.