发明授权
US08437476B2 Hybrid method for distributing keys for the diffusion of encrypted data
有权
用于分发加密数据扩散密钥的混合方法
- 专利标题： Hybrid method for distributing keys for the diffusion of encrypted data
- 专利标题（中）： 用于分发加密数据扩散密钥的混合方法
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申请号： US12296316申请日： 2007-04-06
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公开(公告)号： US08437476B2公开(公告)日： 2013-05-07
- 发明人: Sandrine Agagliate , Renaud Dubois , Eric Garrido
- 申请人： Sandrine Agagliate , Renaud Dubois , Eric Garrido
- 申请人地址： FR Neuilly sur Seine
- 专利权人： Thales
- 当前专利权人： Thales
- 当前专利权人地址： FR Neuilly sur Seine
- 代理机构： Lowe Hauptman Ham & Berner, LLP
- 优先权： FR0603104 20060407
- 国际申请： PCT/EP2007/053436 WO 20070406
- 国际公布： WO2007/116043 WO 20071018
- 主分类号： H04L9/08
- IPC分类号： H04L9/08
摘要：
The invention relates to a method for broadcasting data in a system using a BES (A1) stateless scheme using a binary tree T with a KEKs No 2 key structure, i.e. such that a key ki,j is associated with each difference of subsets Si,j, and a root key k0, - - - associated with the set of the tree T and a BES (A2) “stateful” scheme using the same binary tree T with a KEKs No 1 key structure, i.e. such that a key ki is associated with each subtree Si wherein the scheme (A1) is used for the current broadcast session and the keys known by the denied users are updated with a “stateful” scheme (A2) from time to time.
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