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    • 25. 发明申请
    • INFORMATION PROCESSING UNIT, TERMINAL UNIT, INFORMATION PROCESSING METHOD, KEY GENERATION METHOD AND PROGRAM
    • 信息处理单元,终端单元,信息处理方法,关键生成方法和程序
    • US20100077201A1
    • 2010-03-25
    • US12515235
    • 2007-10-03
    • Tomoyuki AsanoMasafumi Kusakawa
    • Tomoyuki AsanoMasafumi Kusakawa
    • H04L9/32G06F17/30G06F12/14H04L9/00
    • H04L9/0833H04L9/0822H04L2209/60
    • There is provided an information processing unit enabling reduction of the number of keys to be held by a terminal unit and the amount of calculations necessary for decryption of encrypted data. The information processing unit configures an entire binary tree made up of n-number of leaf nodes, a root node and a plurality of intermediate nodes different from the root node and the leaf nodes and divides the entire tree into a plurality of base subtrees including n1/y number of leaf nodes to form a y-level (y is a divisor of log(n)) hierarchical structure, such that root nodes of the base subtrees at a lower level coincide with leaf nodes of the base subtree at an upper level. Further, it assigns subsets of the terminal units to nodes of the respective base subtrees and generates directed graphs where directed edges connecting coordinate points on a coordinate axis are set.
    • 提供了一种信息处理单元,其能够减少由终端单元保持的密钥的数量和解密加密数据所需的计算量。 信息处理单元配置由n个叶节点,根节点和不同于根节点和叶节点的多个中间节点组成的整个二叉树,并将整个树分为多个基本子树,包括n1 / y叶节点数以形成y级(y是log(n)的除数)分层结构,使得较低级别的基本子树的根节点与上层的基本子树的叶节点一致 。 此外,它将终端单元的子集分配给各个基本子树的节点,并生成连接坐标轴上的坐标点的有向边被设置的有向图。