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    • 96. 发明授权
    • System and method for processing information using encryption key block
    • 信息处理系统和使用加密密钥块的方法
    • US07269257B2
    • 2007-09-11
    • US10048658
    • 2001-06-15
    • Yoshimichi KitayaRyuji IshiguroYoshitomo OsawaTomoyuki Asano
    • Yoshimichi KitayaRyuji IshiguroYoshitomo OsawaTomoyuki Asano
    • H04L9/00
    • H04L9/0836G11B20/00086G11B20/0021G11B20/00536G11B20/00659H04L9/0822H04L9/0891H04L2209/60
    • 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.
    • 使用加密密钥块的信息处理系统和方法基于密钥树中的设备(能力)的数据处理能力分类的子树,其中各个密钥对应于树的根,节点和树叶,其中 多个设备被构成为叶子,生成对于每个子树(实体)的管理对象中的实体有效的子启用密钥块,并且生成仅能够由具有共同能力的实体解码的启用密钥块。 此外,使用加密密钥块的信息处理系统和方法管理密钥树(子树)的部分树,仅基于与包括在子树中的节点或叶子相对应的密钥集来生成子启用密钥块, 并且通过使用子启用密钥块来生成仅由选择的实体可解码的启用密钥块。 因此,可以生成并分配与设备的数据处理能力相对应的启用密钥块,并且通过划分分层密钥树结构来管理设备。