Key update method and apparatus thereof
    11.
    发明申请
    Key update method and apparatus thereof 有权
    密钥更新方法及其装置

    公开(公告)号:US20080120329A1

    公开(公告)日:2008-05-22

    申请号:US11802007

    申请日:2007-05-18

    IPC分类号: G06F17/30

    摘要: A key update method and a key update apparatus are provided. The method includes storing data in a database of an update server, the data having an encoded updated node key in response to a node key update for a group; selecting necessary data, from among the data having the encoded updated node key, to calculate a key immediately prior to when the member is switched to the online mode, and generating member update data; and performing a key update with respect to the member using the member update data in a device corresponding to the member which has switched from the offline mode to the online mode.

    摘要翻译: 提供了一种密钥更新方法和密钥更新装置。 所述方法包括:将数据存储在更新服务器的数据库中,所述数据响应于组的节点密钥更新而具有编码的更新节点密钥; 从具有编码的更新节点密钥的数据中选择必要的数据,以便在成员切换到在线模式之前计算密钥,并生成成员更新数据; 并且使用与从离线模式切换到在线模式的成员相对应的设备中的成员更新数据对成员进行密钥更新。

    Method and apparatus for local domain management using device with local authority module
    12.
    发明申请
    Method and apparatus for local domain management using device with local authority module 有权
    使用具有本地权限模块的设备进行本地域管理的方法和装置

    公开(公告)号:US20080118068A1

    公开(公告)日:2008-05-22

    申请号:US11819255

    申请日:2007-06-26

    IPC分类号: H04L9/08 H04L9/28

    CPC分类号: H04L9/0836 H04L9/0891

    摘要: A group key update method and a group key update apparatus for updating a key of members in a group are provided. The group key update method includes selecting a sub-root node among nodes on the binary tree; performing a node change with respect to the group according to a type of the sub-root node, and generating a changed binary tree; and performing a node key update with respect to the changed binary tree.

    摘要翻译: 提供了用于更新组中的成员的密钥的组密钥更新方法和组密钥更新装置。 组密钥更新方法包括在二叉树上的节点中选择子根节点; 根据子根节点的类型执行关于组的节点改变,并且生成改变的二叉树; 并且针对改变的二叉树执行节点密钥更新。

    Video fingerprinting apparatus in frequency domain and method using the same
    13.
    发明申请
    Video fingerprinting apparatus in frequency domain and method using the same 失效
    频域视频指纹识别装置及其使用方法

    公开(公告)号:US20080019577A1

    公开(公告)日:2008-01-24

    申请号:US11702585

    申请日:2007-02-06

    IPC分类号: G06K9/00

    摘要: A video fingerprint insertion apparatus is provided. A frequency domain selection unit selects a frequency domain into which a fingerprint is inserted, from frequency domains of a video; a fingerprint insertion position determination unit determines a position where the fingerprint is to be inserted, based on a fingerprint insertion determination value in the selected frequency domain; and a fingerprint insertion unit inserts a fingerprint bit stream whose insertion strength is controlled, to the position where the fingerprint is to be inserted.

    摘要翻译: 提供了一种视频指纹插入装置。 频域选择单元从视频的频域中选择插入有指纹的频域; 指纹插入位置确定单元基于所选择的频域中的指纹插入确定值来确定要插入指纹的位置; 并且指纹插入单元将插入强度被控制的指纹比特流插入到要插入指纹的位置。

    Method of and device for updating group key
    14.
    发明申请
    Method of and device for updating group key 有权
    组密钥更新方法和设备

    公开(公告)号:US20080013739A1

    公开(公告)日:2008-01-17

    申请号:US11819230

    申请日:2007-06-26

    IPC分类号: H04L9/08 H04L9/28

    CPC分类号: H04L9/0891 H04L9/0836

    摘要: A method and device for updating a group key are disclosed. The group key updating method comprises determining a start node for a key update on a binary tree, updating a node key of the start node for a key update, updating a node key of a parent node of a node corresponding to the updated node key using the updated node key, and repeatedly performing the updating of the node key of the parent node, and then updating a node key corresponding to a root node of the binary tree. With the disclosed method and device, it is possible to efficiently perform a group key update process.

    摘要翻译: 公开了一种用于更新组密钥的方法和设备。 组密钥更新方法包括:确定用于二进制树上的密钥更新的起始节点,更新用于密钥更新的起始节点的节点密钥,使用更新的节点密钥更新与节点密钥相对应的节点的父节点的节点密钥 更新的节点密钥,并且重复执行父节点的节点密钥的更新,然后更新与二叉树的根节点相对应的节点密钥。 利用所公开的方法和装置,可以有效地执行组密钥更新处理。

    Rekey index generation method and rekey index generation apparatus
    15.
    发明授权
    Rekey index generation method and rekey index generation apparatus 有权
    重新生成索引生成方法和密钥索引生成装置

    公开(公告)号:US08509443B2

    公开(公告)日:2013-08-13

    申请号:US11798401

    申请日:2007-05-14

    CPC分类号: H04L9/0891 H04L9/0836

    摘要: A rekey index generation method and a rekey index generation apparatus are provided. The rekey index generation method includes inserting join information to a first field of a rekey index when new members join a group; and inserting node numbers, corresponding to each of the new members, into a second field of the rekey index for a receiver to select a necessary key from among transmitted encoded keys.

    摘要翻译: 提供重新生成密钥索引生成方法和密钥索引生成装置。 重新生成密钥索引生成方法包括当新成员加入组时将连接信息插入到密钥索引的第一字段中; 以及将对应于每个新成员的节点编号插入到密钥索引的第二字段中,用于接收器从发送的编码密钥中选择必要的密钥。

    Method of and device for updating group key
    16.
    发明授权
    Method of and device for updating group key 有权
    组密钥更新方法和设备

    公开(公告)号:US08401182B2

    公开(公告)日:2013-03-19

    申请号:US11819230

    申请日:2007-06-26

    IPC分类号: G06F21/00

    CPC分类号: H04L9/0891 H04L9/0836

    摘要: A method and device for updating a group key are disclosed. The group key updating method comprises determining a start node for a key update on a binary tree, updating a node key of the start node for a key update, updating a node key of a parent node of a node corresponding to the updated node key using the updated node key, and repeatedly performing the updating of the node key of the parent node, and then updating a node key corresponding to a root node of the binary tree. With the disclosed method and device, it is possible to efficiently perform a group key update process.

    摘要翻译: 公开了一种用于更新组密钥的方法和设备。 组密钥更新方法包括:确定用于二进制树上的密钥更新的起始节点,更新用于密钥更新的起始节点的节点密钥,使用更新的节点密钥更新与节点密钥相对应的节点的父节点的节点密钥 更新的节点密钥,并且重复执行父节点的节点密钥的更新,然后更新与二叉树的根节点相对应的节点密钥。 利用所公开的方法和装置,可以有效地执行组密钥更新处理。

    Method of updating group key and group key update device using the same
    17.
    发明授权
    Method of updating group key and group key update device using the same 有权
    更新使用该组密钥和组密钥更新设备的组密钥和组密钥更新设备的方法

    公开(公告)号:US08270614B2

    公开(公告)日:2012-09-18

    申请号:US11819255

    申请日:2007-06-26

    IPC分类号: H04L9/08

    CPC分类号: H04L9/0836 H04L9/0891

    摘要: A group key update method and a group key update apparatus for updating a key of members in a group are provided. The group key update method includes selecting a sub-root node among nodes on the binary tree; performing a node change with respect to the group according to a type of the sub-root node, and generating a changed binary tree; and performing a node key update with respect to the changed binary tree.

    摘要翻译: 提供了用于更新组中的成员的密钥的组密钥更新方法和组密钥更新装置。 组密钥更新方法包括在二叉树上的节点中选择子根节点; 根据子根节点的类型执行关于组的节点改变,并且生成改变的二叉树; 并且针对改变的二叉树执行节点密钥更新。

    Rekey index generation method and rekey index generation apparatus
    18.
    发明申请
    Rekey index generation method and rekey index generation apparatus 有权
    重新生成索引生成方法和密钥索引生成装置

    公开(公告)号:US20080123853A1

    公开(公告)日:2008-05-29

    申请号:US11798401

    申请日:2007-05-14

    IPC分类号: H04K1/00

    CPC分类号: H04L9/0891 H04L9/0836

    摘要: A rekey index generation method and a rekey index generation apparatus are provided. The rekey index generation method includes inserting join information to a first field of a rekey index when new members join a group; and inserting node numbers, corresponding to each of the new members, into a second field of the rekey index for a receiver to select a necessary key from among transmitted encoded keys.

    摘要翻译: 提供重新生成密钥索引生成方法和密钥索引生成装置。 重新生成密钥索引生成方法包括当新成员加入组时将连接信息插入到密钥索引的第一字段中; 以及将对应于每个新成员的节点编号插入到密钥索引的第二字段中,用于接收器从发送的编码密钥中选择必要的密钥。

    Method of generating node indentifier in tree structure
    19.
    发明申请
    Method of generating node indentifier in tree structure 有权
    在树结构中生成节点标识符的方法

    公开(公告)号:US20080086448A1

    公开(公告)日:2008-04-10

    申请号:US11785672

    申请日:2007-04-19

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30961

    摘要: Provided are a method of generating a node identifier including padding information and location information, in a tree structure, a computer-readable storage medium storing a program for executing a method of generating a node identifier in a tree structure, and a terminal apparatus using the tree structure. The location information is generated by using branch identifiers, each of the branch identifiers being allocated for each branch from a root node to a target node. The padding information is generated by a padding code, which includes information about a group of the target node, and depth information, which includes information about a level of the target node in the tree structure.

    摘要翻译: 提供了一种在树结构中生成包括填充信息和位置信息的节点标识符的方法,存储用于执行在树结构中生成节点标识符的方法的程序的计算机可读存储介质,以及使用 树结构。 通过使用分支标识符来生成位置信息,每个分支从根节点分配给目标节点。 填补信息由包括关于目标节点的组的信息的填充代码和包括关于树结构中的目标节点的级别的信息的深度信息生成。

    Method and apparatus for updating a group key
    20.
    发明申请
    Method and apparatus for updating a group key 有权
    用于更新组密钥的方法和装置

    公开(公告)号:US20080075286A1

    公开(公告)日:2008-03-27

    申请号:US11819604

    申请日:2007-06-28

    IPC分类号: H04L9/00

    CPC分类号: H04L9/0836 H04L9/0891

    摘要: A method and apparatus for updating a group key of a group corresponding to a binary tree are provided. The method includes updating keys of leaf nodes that correspond to new members, in response to a join of at least two new members joining the group; determining whether both of two child nodes of a single ancestor node are updated when updating a key of the single ancestor node of the leaf nodes; establishing one of the two child nodes as an update use node when both the two child nodes are updated; and updating a key of the ancestor node using the updating node. Thus, the group key may be effectively updated with respect to multi-join.

    摘要翻译: 提供了一种用于更新与二叉树对应的组的组密钥的方法和装置。 所述方法包括响应于至少两个加入所述组的新成员的连接来更新对应于新成员的叶节点的密钥; 当更新叶节点的单个祖先节点的密钥时,确定单个祖先节点的两个子节点是否被更新; 当两个子节点都更新时,将两个子节点之一建立为更新使用节点; 以及使用所述更新节点来更新所述祖先节点的密钥。 因此,组密钥可以相对于多连接被有效地更新。