Group signature system and method providing controllable linkability
    2.
    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

    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。

    Content protection apparatus and method using binding of additional information to encryption key
    9.
    发明授权
    Content protection apparatus and method using binding of additional information to encryption key 有权
    内容保护装置和方法,使用附加信息绑定到加密密钥

    公开(公告)号:US08571210B2

    公开(公告)日:2013-10-29

    申请号:US13241124

    申请日:2011-09-22

    IPC分类号: H04L9/00

    摘要: The present invention relates to a content protection apparatus and method using binding of additional information to an encryption key. The content protection apparatus includes an encryption unit for creating an encryption key required to encrypt data requested by a user terminal and then generating encrypted data in which the data is encrypted. An additional information management unit manages additional information including authority information about the encrypted data. A White-Box Cryptography (WBC) processing unit generates a WBC table required to bind the encryption key corresponding to the encrypted data to the additional information. A bound data generation unit generates bound data in which the encrypted key is bound to the additional information, using a cipher included in the WBC table.

    摘要翻译: 本发明涉及使用附加信息与加密密钥的绑定的内容保护装置和方法。 内容保护装置包括:加密单元,用于创建加密由用户终端请求的数据所需的加密密钥,然后生成加密数据的加密数据。 附加信息管理单元管理包括关于加密数据的权限信息的附加信息。 白盒加密(WBC)处理单元生成将加密数据对应的加密密钥与附加信息绑定所需的WBC表。 绑定数据生成单元使用包含在WBC表中的密码来生成加密密钥与附加信息绑定的绑定数据。

    License managing method and device
    10.
    发明授权
    License managing method and device 有权
    许可证管理方法和设备

    公开(公告)号:US08341414B2

    公开(公告)日:2012-12-25

    申请号:US12617185

    申请日:2009-11-12

    IPC分类号: H04L9/32

    CPC分类号: G06F21/10

    摘要: A license managing device sets a security area for storing a license file, maintains the security area as an encoded file in an inactive state of the security area by encoding the security area, maintains the security area as a directory in an active state of the security area by decoding the security area, and encodes a license file by using a file encoding key according to the user's request and stores the same in a security area in an active state of the security area.

    摘要翻译: 许可证管理装置设置用于存储许可证文件的安全区域,通过对安全区域进行编码将安全区域维护为安全区域的非活动状态,将安全区域维护为安全区域的活动状态的目录 区域,并且根据用户的请求使用文件编码密钥对许可证文件进行编码,并将其存储在安全区域的活动状态的安全区域中。