发明公开
- 专利标题： PROCÉDÉ DE CONDITIONNEMENT ET DE CONTRÔLE D'ACCÈS À DES CONTENUS EN CODAGE HIÉRARCHIQUE, PROCESSEUR ET ÉMETTEUR POUR CE PROCÉDÉ
- 专利标题（英）： Method for conditioning and controlling the access to hierarchical coding content, and processor and transmitter for said method
- 专利标题（中）： 方法调节和控制对分层编码内容和处理器和发射的程序的访问
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申请号： EP08853689.1申请日： 2008-11-05
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公开(公告)号： EP2223524A1公开(公告)日： 2010-09-01
- 发明人: DUBROEUCQ, Gilles
- 申请人： Viaccess
- 申请人地址： Les Collines de l'Arche Tour Opéra C 76, Route de la Demi-Lune 92057 Paris La Défense Cedex FR
- 专利权人： Viaccess
- 当前专利权人： Viaccess
- 当前专利权人地址： Les Collines de l'Arche Tour Opéra C 76, Route de la Demi-Lune 92057 Paris La Défense Cedex FR
- 代理机构： Blot, Philippe Robert Emile
- 优先权： FR0758921 20071109
- 国际公布： WO2009068785 20090604
- 主分类号： H04N5/00
- IPC分类号： H04N5/00 ; H04N7/24
摘要：
The invention relates to a method for hierarchical access control, that comprises: receiving (100) and transmitting (106) to a security processor second cryptograms (CWi)Ki, with i between 1 and k-1, obtained by ciphering control words CW1 to CWk-1 with respective keys K1 to Kk-1 created with at least a portion of the set including the information present in the ECMk and of the exploitation key CEk; deciphering the second cryptograms (CWi)Ki only if the access conditions CAk received in a message ECMk correspond to access titles TA and without previously comparing the access conditions CAi to the access titles TA for i strictly lower than k and, in the opposite case; forbidding (100) the deciphering of the second cryptograms (CWi)Ki if the access conditions CAk do not correspond to the access titles TA.
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