发明名称 |
Method for broadcast encryption and key revocation of stateless receivers |
摘要 |
A tree is used to partition stateless receivers in a broadcast content encryption system into subsets. Two different methods of partitioning are disclosed. When a set of revoked receivers is identified, the revoked receivers define a relatively small cover of the non-revoked receivers by disjoint subsets. Subset keys associated with the subsets are then used to encrypt a session key that in turn is used to encrypt the broadcast content. Only non-revoked receivers can decrypt the session key and, hence, the content.
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申请公布号 |
US7698551(B2) |
申请公布日期 |
2010.04.13 |
申请号 |
US20050117677 |
申请日期 |
2005.04.28 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
LOTSPIECH JEFFREY BRUCE;NAOR DALIT;NAOR SIMEON |
分类号 |
H04L9/00;H04L9/08;H04L12/18;H04L29/06 |
主分类号 |
H04L9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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