会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明申请
    • METHOD AND APPARATUS FOR TRANSMITTING CONTENT KEY
    • 用于发送内容的方法和装置
    • US20090274305A1
    • 2009-11-05
    • US12271379
    • 2008-11-14
    • Sun-nam LEEChoong-hoon LEEYoung-sun YOONHak-soo JUJin-mok KIM
    • Sun-nam LEEChoong-hoon LEEYoung-sun YOONHak-soo JUJin-mok KIM
    • H04L9/00
    • H04L9/0836H04L9/0891H04L2209/601
    • Provided is a method of transmitting content keys to nodes arranged in a hierarchical structure which includes a plurality of node groups each including a predetermined number of the nodes. In this method, revoke information that includes identifiers of revoked node groups in the hierarchical structure, the total number of independent revoked nodes, and identifiers of the independent revoked nodes is generated. The revoked node groups are node groups consisting of only revoked nodes, and the independent revoked nodes are revoked nodes not belonging to any of the revoked node groups. Then, encrypted content keys are obtained by encrypting content keys using broadcast encryption, by using an encryption key set that has a form that cannot be generated using a decryption key set that the revoked nodes possess, and a set of encrypted content keys is generated. Thereafter, the revoke information and the set of the encrypted content keys are transmitted to all of the nodes arranged in the hierarchical structure.
    • 提供了将内容密钥发送到分层结构中布置的节点的方法,该方法包括多个节点组,每个节点组包括预定数量的节点。 在该方法中,撤销包括层次结构中的撤销节点组的标识符的信息,独立撤销节点的总数和独立撤销节点的标识符。 撤销的节点组是仅由撤销节点组成的节点组,独立撤销节点是不属于任何撤销节点组的撤销节点。 然后,通过使用具有不能使用撤销节点拥有的解密密钥集而不能生成的形式的加密密钥集,并且生成一组加密的内容密钥,通过使用广播加密来加密内容密钥来获得加密的内容密钥。 此后,撤销信息和加密的内容密钥的集合被发送到以分层结构排列的所有节点。