公开(公告)号：BRPI0516977A

公开(公告)日：2008-09-30

申请号：BRPI0516977

申请日：2005-10-20

Applicant: KOREA ELECTRONICS TELECOMM ,  INKA ENTWORKS INC

Inventor： YOON KI SONG ,  JEONG YEON JEONG ,  HWANG SEONG OUN ,  NAM DO WON ,  KIM JEONG HYUN ,  PARK JI HYUN ,  KIM JUN II ,  KIM SEONG HAN ,  JANG WAN HO ,  AHN SEONG MIN

IPC: G06F17/00

Abstract: Provided is a system for exchanging contents between a first DRM apparatus and a second DRM apparatus, wherein each of which belongs to different DRM domain. The first DRM apparatus includes unpackaging means for unpackaging first DRM formatted contents into clear resources, metadata, and rights expression; converting means for converting each of the clear resources, metadata, and rights expression into its own predefined neutral format, respectively; generating means for generating neutral formatted contents by combining the converted resources, metadata, and rights expression; adding predetermined header information thereto; and transmitting means for transmitting the neutral-formatted contents to said second DRM apparatus. The second DRM apparatus includes extracting means for extracting clear resources, metadata, and rights expression from the neutral-formatted contents transmitted from said first DRM apparatus; and packaging means for packaging the extracted clear resources, metadata, and rights expression into second DRM formatted contents.

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。

公开(公告)号：WO2009078636A3

公开(公告)日：2009-10-22

申请号：PCT/KR2008007403

申请日：2008-12-15

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

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

IPC: G06F17/00 ,  G06Q30/06

CPC classification number: H04N21/835 ,  G06Q30/0601 ,  H04L63/0428 ,  H04L2463/101 ,  H04N7/173 ,  H04N21/2541 ,  H04N21/4627 ,  H04N21/4788 ,  H04N21/8355

Abstract: an apparatus for protecting contents streamed through re-transmission, includes a content service site for servicing a content, managing end user and re-sender re-transmitting the content streamed from the content service site to another user, and issuing and managing a re-transmission license and a content license. The end user pays a charge to the content service site, receives an issued license from the content service site, and uses the content received from the re-sender through re-transmission.

Abstract translation: 一种用于保护通过重传流传输的内容的装置，包括用于对内容进行服务的内容服务站点，管理终端用户和重新发送者将从内容服务站点流传输的内容重新发送到另一用户， 传输许可证和内容许可证。 最终用户向内容服务站点支付费用，从内容服务站点接收已发放的许可证，并通过重传使用从重发送者接收到的内容。

公开(公告)号：EP1817687A4

公开(公告)日：2014-01-01

申请号：EP05808645

申请日：2005-10-20

Applicant: KOREA ELECTRONICS TELECOMM ,  INKA ENTWORKS INC

Inventor： YOON KI SONG ,  JEONG YEON JEONG ,  HWANG SEONG OUN ,  NAM DO WON ,  KIM JEONG HYUN ,  PARK JI HYUN ,  JEONG SANG WON ,  KIM JUN IL ,  AHN SEONG MIN ,  KIM SEONG HAN ,  JANG WAN HO

IPC: G06F17/00 ,  G06F21/10

CPC classification number: G06F21/10 ,  G06F2221/0728

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。