发明授权
- 专利标题： Methods and apparatuses for key generation, encryption and decryption in broadcast encryption
- 专利标题（中）： 广播加密中密钥生成，加密和解密的方法和装置
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申请号： US12761852申请日： 2010-04-16
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公开(公告)号： US08290154B2公开(公告)日： 2012-10-16
- 发明人: Zhenfu Cao , Huang Lin , Xiaolei Dong , Xiaohui Liang , Dongsheng Xing
- 申请人： Zhenfu Cao , Huang Lin , Xiaolei Dong , Xiaohui Liang , Dongsheng Xing
- 申请人地址： JP Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： CN200910137370 20090424
- 主分类号： H04L9/00
- IPC分类号： H04L9/00
摘要：
Methods and apparatuses for key generation, encryption and decryption in broadcast encryption. A public parameter and a primary key based on a first random number are generated. For each of leaf nodes in a binary tree, a right key set of the leaf node is calculated, the right key set including a right key of the leaf node and right keys of right brother nodes for all the nodes on a path from a root node to the leaf node. A left key set of the leaf node is calculated, the left key set including a left key of the leaf node and left keys of left brother nodes for all the nodes on the path. The sum of the second and third random numbers equals to the first random number. The second random number is different for different subscribers.
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