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    Group signature system and method providing controllable linkability
    3.
    发明授权
    Group signature system and method providing controllable linkability 有权
    组签名系统和方法提供可控的可链接性

    公开(公告)号：US08762729B2

    公开(公告)日：2014-06-24

    申请号：US13079588

    申请日：2011-04-04

    申请人： Jung Yeon Hwang ,  Sokjoon Lee ,  Gun Tae Bae ,  Yun-Kyung Lee ,  Hyeran Mun ,  Sang-Woo Lee ,  Sin Hyo Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    发明人： Jung Yeon Hwang ,  Sokjoon Lee ,  Gun Tae Bae ,  Yun-Kyung Lee ,  Hyeran Mun ,  Sang-Woo Lee ,  Sin Hyo Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    IPC分类号： H04L9/32 ,  G06Q20/00

    CPC分类号： H04L9/3255

    摘要： A group signature system includes: a key issuer server for generating a first parameter of a group public key, generating a corresponding master issuing key, and issuing a signature key to a user when a user device joins; an opener server for generating a second parameter of the group public key, and a corresponding master opening key and master linking key; and a linker server for checking whether two valid signatures have been linked by using the master linking key when the two signatures corresponding to a group public key are given. The group signature system further includes: a signature verifying unit for confirming a validity of the given signatures and a signer information confirming unit for confirming a validity of singer confirming information generated by the opener server.

    摘要翻译： 组签名系统包括：密钥发行者服务器，用于生成组公钥的第一参数，生成对应的主发行密钥，以及当用户设备加入时向用户发出签名密钥; 用于生成组公钥的第二参数的开启器服务器，以及对应的主开放密钥和主链接密钥; 以及链接服务器，用于当给出对应于组公钥的两个签名时，通过使用主链接密钥来检查两个有效签名是否已被链接。 组签名系统还包括：用于确认给定签名的有效性的签名验证单元和用于确认由开启服务器生成的歌手确认信息的有效性的签名者信息确认单元。

    ANONYMOUS AUTHENTICATION SERVICE METHOD FOR PROVIDING LOCAL LINKABILITY
    8.
    发明申请
    ANONYMOUS AUTHENTICATION SERVICE METHOD FOR PROVIDING LOCAL LINKABILITY 有权
    用于提供本地连接性的匿名认证服务方法

    公开(公告)号：US20110154045A1

    公开(公告)日：2011-06-23

    申请号：US12971103

    申请日：2010-12-17

    申请人： Sok Joon Lee ,  Jung Yeon Hwang ,  Yun Kyung Lee ,  Sin Hyo Kim ,  Sang Woo Lee ,  Hye Ran Moon ,  Young Ho Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    发明人： Sok Joon Lee ,  Jung Yeon Hwang ,  Yun Kyung Lee ,  Sin Hyo Kim ,  Sang Woo Lee ,  Hye Ran Moon ,  Young Ho Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    IPC分类号： H04L9/32

    CPC分类号： H04L9/3073 ,  H04L9/3255 ,  H04L2209/42

    摘要： There is provided an anonymous service method of providing local linkability. The anonymous service method providing local linkability according to exemplary embodiments of the invention, an anonymous authentication operation based on a short group signature is performed, for which the concept of a local linkability is introduced to secure linkability within the same service domain. Namely, in the interior of a service provider, a virtual index having a fixed value is calculated for each service user, and in this case, although a plurality of service providers collude with each other, they cannot calculate a virtual index having the same value, whereby the linkability can be secured within the same service domain but not within the interiors of different service domains.

    摘要翻译： 提供了提供本地可链接性的匿名服务方法。 执行根据本发明的示例性实施例的本地可链接性的匿名服务方法，执行基于短组签名的匿名认证操作，为此引入本地可链接性的概念以确保相同服务域内的可链接性。 也就是说，在服务提供者的内部，为每个服务用户计算具有固定值的虚拟索引，在这种情况下，尽管多个服务提供者彼此串通，但是它们不能计算具有相同值的虚拟索引 从而可以在相同的服务领域内确保可链接性，但不能在不同的服务领域的内部。

    Anonymous authentication service method for providing local linkability
    9.
    发明授权
    Anonymous authentication service method for providing local linkability 有权
    用于提供本地可链接性的匿名认证服务方法

    公开(公告)号：US08499158B2

    公开(公告)日：2013-07-30

    申请号：US12971103

    申请日：2010-12-17

    申请人： Sok Joon Lee ,  Jung Yeon Hwang ,  Yun Kyung Lee ,  Sin Hyo Kim ,  Sang Woo Lee ,  Hye Ran Moon ,  Young Ho Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    发明人： Sok Joon Lee ,  Jung Yeon Hwang ,  Yun Kyung Lee ,  Sin Hyo Kim ,  Sang Woo Lee ,  Hye Ran Moon ,  Young Ho Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    IPC分类号： H04L9/32

    CPC分类号： H04L9/3073 ,  H04L9/3255 ,  H04L2209/42

    摘要： There is provided an anonymous service method of providing local linkability. The anonymous service method providing local linkability according to exemplary embodiments of the invention, an anonymous authentication operation based on a short group signature is performed, for which the concept of a local linkability is introduced to secure linkability within the same service domain. Namely, in the interior of a service provider, a virtual index having a fixed value is calculated for each service user, and in this case, although a plurality of service providers collude with each other, they cannot calculate a virtual index having the same value, whereby the linkability can be secured within the same service domain but not within the interiors of different service domains.

    摘要翻译： 提供了提供本地可链接性的匿名服务方法。 执行根据本发明的示例性实施例的本地可链接性的匿名服务方法，执行基于短组签名的匿名认证操作，为此引入本地可链接性的概念以确保相同服务域内的可链接性。 也就是说，在服务提供者的内部，为每个服务用户计算具有固定值的虚拟索引，在这种情况下，尽管多个服务提供者彼此串通，但是它们不能计算具有相同值的虚拟索引 从而可以在相同的服务领域内确保可链接性，但不能在不同的服务领域的内部。

    User terminal system, digital rights management system including the user terminal system, and method of managing digital rights
    10.
    发明授权
    User terminal system, digital rights management system including the user terminal system, and method of managing digital rights 有权
    用户终端系统，包括用户终端系统的数字版权管理系统和数字权限管理方法

    公开(公告)号：US08447885B2

    公开(公告)日：2013-05-21

    申请号：US12878313

    申请日：2010-09-09

    申请人： Sin Hyo Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    发明人： Sin Hyo Kim ,  Byung Ho Chung ,  Hyun Sook Cho

    IPC分类号： G06F15/16

    CPC分类号： G06F21/10 ,  G06F2221/0768

    摘要： Provided is a digital rights management system, in which a process of combining digital content created by the original author with first metadata indicated with rights information of the original author and a process of combining revised digital content with second metadata indicated with rights information of a secondary author, are respectively and separately performed at the server and terminal sides. Thus, the digital rights management system can reduce the load generated at the server side compared to a system in which the server side performs both of the above processes.

    摘要翻译： 提供了一种数字版权管理系统，其中将由原始作者创建的数字内容与表示原始作者的权利信息的第一元数据组合的过程和将修改后的数字内容与第二元数据相结合的第二元数据的过程 作者，分别在服务器端和终端侧执行。 因此，与服务器侧执行上述两个处理的系统相比，数字版权管理系统可以减少在服务器端产生的负载。