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    METHOD OF MANAGING GROUP KEY FOR SECURE MULTICAST COMMUNICATION
    1.
    发明申请
    METHOD OF MANAGING GROUP KEY FOR SECURE MULTICAST COMMUNICATION 审中-公开
    用于安全多播通信的组密钥管理方法

    公开(公告)号：WO2010067929A2

    公开(公告)日：2010-06-17

    申请号：PCT/KR2009002532

    申请日：2009-05-13

    Applicant: KOREA ELECTRONICS TELECOMM ,  PARK JEE HYUN ,  KIM JUNG HYUN ,  LEE JUNG SOO ,  JEONG YEON JEONG ,  NAM DO-WON ,  YOON KISONG

    Inventor： PARK JEE HYUN ,  KIM JUNG HYUN ,  LEE JUNG SOO ,  JEONG YEON JEONG ,  NAM DO-WON ,  YOON KISONG

    IPC: H04L9/08 ,  H04L29/06

    CPC classification number: H04L9/0822 ,  H04L9/0825 ,  H04L9/0836 ,  H04L9/0891 ,  H04L12/185 ,  H04L63/065

    Abstract: A group key management method for secure multicast communication includes: creating a tree having a root node, internal nodes and leaf nodes to manage group keys of a receiver group by a group key management server; generating user keys of all nodes excluding the root node in the tree on the basis of Chinese Remainder Theorem; assigning the leaf nodes of the tree to users of the receiver group; and sending the user keys of the leaf nodes to the corresponding users for group key management. Further, the group key management method for secure multicast communication includes generating group keys of all non-leaf nodes; computing a solution of congruence equations based on the user key and group key by using Chinese Remainder Theorem for each non-leaf node; and multicasting a group key update message to each user of the respective leaf nodes.

    Abstract translation: 用于安全组播通信的组密钥管理方法包括：创建具有根节点，内部节点和叶节点的树，以通过组密钥管理服务器管理接收者组的组密钥; 根据中国剩余定理生成树中除根节点之外的所有节点的用户密钥; 将树的叶节点分配给接收者组的用户; 并将叶节点的用户密钥发送给相应的用户进行组密钥管理。 此外，用于安全组播通信的组密钥管理方法包括生成所有非叶节点的组密钥; 通过对每个非叶节点使用中国剩余定理，基于用户密钥和群密钥计算一致等式的解; 以及将组密钥更新消息多播到各个叶节点的每个用户。

    APPARATUS AND METHOD FOR TRANSFORMING DRM ALGORITHM OF STREAMING DATA
    3.
    发明公开
    APPARATUS AND METHOD FOR TRANSFORMING DRM ALGORITHM OF STREAMING DATA 审中-公开
    用于转换流数据的DRM算法的装置和方法

    公开(公告)号：KR20070105273A

    公开(公告)日：2007-10-30

    申请号：KR20070040233

    申请日：2007-04-25

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM JUN IL ,  NAM DO WON ,  LEE JUNG SOO ,  JEONG YEON JEONG ,  PARK JEE HYUN ,  KIM JUNG HYUN ,  YOON KI SONG

    IPC: G06F17/00 ,  G06F15/00

    CPC classification number: G06F21/10 ,  H04L29/06027 ,  H04L63/0428 ,  H04L65/4076 ,  H04L65/605 ,  H04L2463/101

    Abstract: A device and a method for changing a DRM algorithm of streaming data are provided to enable various DRM client terminals to use a streaming service encoded through various DRMs freely by changing the DRM algorithm stored in the streaming data into a different DRM algorithm if necessary. A plurality of parsers with an N-level receive and parse the streaming data. The plurality of packetizers with the N-level generate the streaming data by packetizing the parsed streaming data. A decoder decodes the data encoded by the n-th level parser among the N parsers according to a first DRM algorithm by connecting to the n-th parser. An encoder encodes the decoded data according to a second DRM algorithm by connecting to the m-th level packetizer among the N packetizers. A path manager manages a path based on m and n to enable the streaming data to be parsed/packetized by the minimum number of parsers and packetizers.

    Abstract translation: 提供了一种用于改变流数据的DRM算法的装置和方法，以使各种DRM客户机终端可以通过将存储在流数据中的DRM算法改变成不同的DRM算法来自由地使用通过各种DRM编码的流服务。 具有N级的多个解析器接收并解析流数据。 具有N级的多个打包器通过分解解析的流数据来生成流数据。 解码器通过连接到第n个解析器，根据第一DRM算法来解码由N个解析器中的第n级解析器编码的数据。 编码器根据第二DRM算法，通过连接到N个打包器中的第m级分类器来对编码的数据进行编码。 路径管理器管理基于m和n的路径，以使流数据由解析器和打包器的最小数量进行解析/打包。

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