Hierarchical threshold tree-based broadcast encryption method
    1.
    发明申请
    Hierarchical threshold tree-based broadcast encryption method 有权
    基于层次阈值树的广播加密方法

    公开(公告)号:US20070189539A1

    公开(公告)日:2007-08-16

    申请号:US11340614

    申请日:2006-01-27

    IPC分类号: H04L9/00

    摘要: A hierarchical threshold tree-based broadcast encryption method includes a first step for a server initialization and a user subscription, a second step of distributing a message to enable a privileged user (authorized user) to decrypt a group key, and a third step of the privileged user (authorized user) decrypting the message using the group key. According to the method, it is possible to prevent any group of revocators from obtaining the group key using their secret information and information being broadcast by the server.

    摘要翻译: 基于分层阈值树的广播加密方法包括用于服务器初始化和用户订阅的第一步骤,分发消息以使得特权用户(授权用户)能够解密组密钥的第二步骤,以及第三步骤 特权用户(授权用户)使用组密钥解密消息。 根据该方法,可以防止任何一组撤销者使用其秘密信息和由服务器广播的信息来获得组密钥。

    Hierarchical threshold tree-based broadcast encryption method
    2.
    发明授权
    Hierarchical threshold tree-based broadcast encryption method 有权
    基于层次阈值树的广播加密方法

    公开(公告)号:US08005225B2

    公开(公告)日:2011-08-23

    申请号:US11340614

    申请日:2006-01-27

    IPC分类号: H04L29/00

    摘要: A hierarchical threshold tree-based broadcast encryption method includes a first step for a server initialization and a user subscription, a second step of distributing a message to enable a privileged user (authorized user) to decrypt a group key, and a third step of the privileged user (authorized user) decrypting the message using the group key. According to the method, it is possible to prevent any group of revocators from obtaining the group key using their secret information and information being broadcast by the server.

    摘要翻译: 基于分层阈值树的广播加密方法包括用于服务器初始化和用户订阅的第一步骤,分发消息以使得特权用户(授权用户)能够解密组密钥的第二步骤,以及第三步骤 特权用户(授权用户)使用组密钥解密消息。 根据该方法,可以防止任何一组撤销者使用其秘密信息和由服务器广播的信息来获得组密钥。

    Method for managing user key for broadcast encryption
    3.
    发明授权
    Method for managing user key for broadcast encryption 失效
    用于管理用于广播加密的用户密钥的方法

    公开(公告)号:US07752435B2

    公开(公告)日:2010-07-06

    申请号:US11271990

    申请日:2005-11-14

    IPC分类号: H04L29/06

    摘要: A method of managing a user key for a broadcast encryption. The method includes assigning numbers to respective users and arranging the users on a ring-shaped structure in order to map hash chains onto the respective nodes of a ring-shaped structure. The method further includes making random node keys correspond to the respective nodes, one by one, constructing the hash chains from the corresponding node keys using a hash function, and successively mapping the constructed hash chains onto the nodes of the ring-shaped structure.

    摘要翻译: 管理用于广播加密的用户密钥的方法。 该方法包括向各个用户分配号码并将用户排列在环形结构上,以便将散列链映射到环形结构的相应节点上。 该方法还包括使随机节点密钥逐个对应于各个节点,使用散列函数从相应的节点密钥构造散列链,并将构建的散列链连续地映射到环形结构的节点上。

    Method for managing user key for broadcast encryption
    4.
    发明申请
    Method for managing user key for broadcast encryption 失效
    用于管理用于广播加密的用户密钥的方法

    公开(公告)号:US20060107043A1

    公开(公告)日:2006-05-18

    申请号:US11271990

    申请日:2005-11-14

    IPC分类号: H04L9/00

    摘要: A method of managing a user key for a broadcast encryption. The method includes assigning numbers to respective users and arranging the users on a ring-shaped structure in order to map hash chains onto the respective nodes of a ring-shaped structure. The method further includes making random node keys correspond to the respective nodes, one by one, constructing the hash chains from the corresponding node keys using a hash function, and successively mapping the constructed hash chains onto the nodes of the ring-shaped structure.

    摘要翻译: 管理用于广播加密的用户密钥的方法。 该方法包括向各个用户分配号码并将用户排列在环形结构上,以便将散列链映射到环形结构的相应节点上。 该方法还包括使随机节点密钥逐个对应于各个节点,使用散列函数从相应的节点密钥构造散列链,并将构建的散列链连续地映射到环形结构的节点上。

    Combination-based broadcast encryption method
    5.
    发明授权
    Combination-based broadcast encryption method 有权
    基于组合的广播加密方式

    公开(公告)号:US08200963B2

    公开(公告)日:2012-06-12

    申请号:US11311256

    申请日:2005-12-20

    IPC分类号: H04L29/06

    摘要: A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.

    摘要翻译: 基于组合的广播加密方法包括:由服务器分配不同组合的基组给每个用户; 通过使用分配给每个用户的基本组作为基础来生成和发送每个用户的秘密信息; 通过用于产生基本组的整数和一个或多个特权用户的键值信息的计算产生和发送反基本参数值; 以及通过使用所述特权用户的密钥值信息来导出组密钥,通过使用导出的组密钥加密会话密钥,以及将加密的会话密钥发送给每个用户。 因此,通过组合为每个用户分配不同的基站,从而具有防止串通攻击的安全性。

    Combination-based broadcast encryption method
    7.
    发明申请
    Combination-based broadcast encryption method 有权
    基于组合的广播加密方式

    公开(公告)号:US20070140483A1

    公开(公告)日:2007-06-21

    申请号:US11311256

    申请日:2005-12-20

    摘要: A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.

    摘要翻译: 基于组合的广播加密方法包括:由服务器分配不同组合的基组给每个用户; 通过使用分配给每个用户的基本组作为基础来生成和发送每个用户的秘密信息; 通过用于产生基本组的整数和一个或多个特权用户的键值信息的计算产生和发送反基本参数值; 以及通过使用所述特权用户的密钥值信息来导出组密钥,通过使用导出的组密钥加密会话密钥,以及将加密的会话密钥发送给每个用户。 因此,通过组合为每个用户分配不同的基站,从而具有防止串通攻击的安全性。

    Combination-based broadcast encryption method
    8.
    发明授权
    Combination-based broadcast encryption method 有权
    基于组合的广播加密方式

    公开(公告)号:US08897445B2

    公开(公告)日:2014-11-25

    申请号:US13460098

    申请日:2012-04-30

    IPC分类号: H04L9/08 G06F21/10

    摘要: A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.

    摘要翻译: 基于组合的广播加密方法包括:由服务器分配不同组合的基组给每个用户; 通过使用分配给每个用户的基本组作为基础来生成和发送每个用户的秘密信息; 通过用于产生基本组的整数和一个或多个特权用户的键值信息的计算产生和发送反基本参数值; 以及通过使用所述特权用户的密钥值信息来导出组密钥,通过使用导出的组密钥加密会话密钥,以及将加密的会话密钥发送给每个用户。 因此,通过组合为每个用户分配不同的基站,从而具有防止串通攻击的安全性。

    Apparatus and method for generating a key for broadcast encryption
    9.
    发明申请
    Apparatus and method for generating a key for broadcast encryption 有权
    用于生成用于广播加密的密钥的装置和方法

    公开(公告)号:US20060078110A1

    公开(公告)日:2006-04-13

    申请号:US11245054

    申请日:2005-10-07

    IPC分类号: H04L9/30

    摘要: An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure, and a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator. Thus, key update can be efficiently achieved.

    摘要翻译: 一种用于生成用于广播加密的密钥的装置和方法。 该装置包括节点秘密生成器,用于管理以树结构接收广播数据的用户,并为树结构中的每个节点生成唯一的节点秘密。 该装置还包括一个即时密钥生成器,用于临时生成树结构中所有节点共同使用的即时密钥,以及节点密钥生成器,用于通过操作在节点秘密生成器处生成的节点秘密来生成每个节点的节点密钥, 在即时密钥生成器处生成的即时密钥。 因此,可以有效地实现密钥更新。

    Apparatus and method for generating a key for broadcast encryption
    10.
    发明授权
    Apparatus and method for generating a key for broadcast encryption 有权
    用于生成用于广播加密的密钥的装置和方法

    公开(公告)号:US08160246B2

    公开(公告)日:2012-04-17

    申请号:US11245054

    申请日:2005-10-07

    IPC分类号: H04L9/00

    摘要: An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure, and a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator. Thus, key update can be efficiently achieved.

    摘要翻译: 一种用于生成用于广播加密的密钥的装置和方法。 该装置包括节点秘密生成器,用于管理以树结构接收广播数据的用户,并为树结构中的每个节点生成唯一的节点秘密。 该装置还包括一个即时密钥生成器,用于临时生成树结构中所有节点共同使用的即时密钥,以及节点密钥生成器,用于通过操作在节点秘密生成器处生成的节点秘密来生成每个节点的节点密钥, 在即时密钥生成器处生成的即时密钥。 因此,可以有效地实现密钥更新。