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    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK
    3.
    发明专利
    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK 未知

    公开(公告)号：CA2379476A1

    公开(公告)日：2001-12-27

    申请号：CA2379476

    申请日：2001-06-15

    Applicant: SONY CORP

    Inventor： OSAWA YOSHITOMO ,  ASANO TOMOYUKI ,  KITAYA YOSHIMICHI ,  ISHIGURO RYUJI

    IPC: G11B20/00 ,  H04L9/08 ,  H04L9/00

    Abstract: Sub-trees separated according to the data processing capability of a device are defined in a key tree in which keys are assigned to the roots, nodes, an d leaves which are devices of a tree. A management entity of each sub-tree creates a sub make-effective key block effective in the entity. A key issuin g center creates a make-effective key block decodable only by an entity having common capability according to the capability information on the entity. Eac h entity manages the partia trees (sub-trees) of the key tree, creates a sub make-effective key block according to only the nodes of the sub-trees or the keys corresponding to the leaves, and creates a make-effective key block decodable only by the selected entity by using the sub make-effective key block. Thus, a make-effective key block can be created in accordance with th e data processing capability of a device and distributed, and the key tree hierarchical structure can be dividedly managed.

    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK
    6.
    发明专利
    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK 未知

    公开(公告)号：CA2379476C

    公开(公告)日：2009-11-10

    申请号：CA2379476

    申请日：2001-06-15

    Applicant: SONY CORP

    Inventor： OSAWA YOSHITOMO ,  ASANO TOMOYUKI ,  ISHIGURO RYUJI ,  KITAYA YOSHIMICHI

    IPC: H04L9/08 ,  G11B20/00

    Abstract: An information processing system and method using an encryption key block se ts sub- trees classified based on data processing ability of the devices (capability ) in a key tree in which respective keys are corresponded to a root, nodes and leaves of a tree in which a plurality of devices are constituted as the leaves, generates a sub-enabli ng key block which is effective for an entity in a managing subject of each sub-tree (entity), and generates an enabling key block decodable only by the entities having common capability. Also, an information processing system and method using an encryption key block manages a partial tree of a key tree (sub-tree), generates a sub- enabling key block based only on a key set corresponding to nodes or leaves included in the sub - tree, and generates an enabling key block decodable only by selected entities by using the sub- enabling key block. Thus, it is possible to generate and distribute an enabling key block corresponding to data processing ability of a device and to manage devices b y dividing a hierarchical key tree structure.

    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK
    7.
    发明专利
    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK 未知

    公开(公告)号：HK1053556A1

    公开(公告)日：2003-10-24

    申请号：HK03104427

    申请日：2003-06-19

    Applicant: SONY CORP

    Inventor： KITAYA YOSHIMICHI ,  ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  ASANO TOMOYUKI

    IPC: G11B20/00 ,  H04L20090101 ,  H04L9/08

    Abstract: An information processing system and method using an encryption key block sets sub-trees classified based on data processing ability of the devices (capability) in a key tree in which respective keys are corresponded to a root, nodes and leaves of a tree in which a plurality of devices are constituted as the leaves, generates a sub-enabling key block which is effective for an entity in a managing subject of each sub-tree (entity), and generates an enabling key block decodable only by the entities having common capability. Also, an information processing system and method using an encryption key block manages a partial tree of a key tree (sub-tree), generates a sub-enabling key block based only on a key set corresponding to nodes or leaves included in the sub-tree, and generates an enabling key block decodable only by selected entities by using the sub-enabling key block. Thus, it is possible to generate and distribute an enabling key block corresponding to data processing ability of a device and to manage devices by dividing a hierarchical key tree structure.

    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK
    10.
    发明公开
    SYSTEM AND METHOD FOR PROCESSING INFORMATION USING ENCRYPTION KEY BLOCK 审中-公开
    设备和方法处理的信息使用密钥块

    公开(公告)号：EP1204236A4

    公开(公告)日：2008-03-05

    申请号：EP01938704

    申请日：2001-06-15

    Applicant: SONY CORP

    Inventor： KITAYA YOSHIMICHI ,  ISHIGURO RYUJI ,  OSAWA YOSHITOMO ,  ASANO TOMOYUKI

    IPC: G11B20/00 ,  H04L9/08 ,  H04L9/00

    CPC classification number: H04L9/0836 ,  G11B20/00086 ,  G11B20/0021 ,  H04L9/0891 ,  H04L2209/60

    Abstract: Sub-trees separated according to the data processing capability of a device are defined in a key tree in which keys are assigned to the roots, nodes, and leaves which are devices of a tree. A management entity of each sub-tree creates a sub make-effective key block effective in the entity. A key issuing center creates a make-effective key block decodable only by an entity having common capability according to the capability information on the entity. Each entity manages the partia trees (sub-trees) of the key tree, creates a sub make-effective key block according to only the nodes of the sub-trees or the keys corresponding to the leaves, and creates a make-effective key block decodable only by the selected entity by using the sub make-effective key block. Thus, a make-effective key block can be created in accordance with the data processing capability of a device and distributed, and the key tree hierarchical structure can be dividedly managed.

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