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1. 发明申请

WO2014117851A1 PROXY MODULES 审中-公开
标题翻译：代用模块
公开(公告)号：WO2014117851A1
公开(公告)日：2014-08-07
申请号：PCT/EP2013/051963
申请日：2013-01-31
申请人： IRDETO B.V.
发明人： WESTERVELD, Egbert , DEKKER, Hans
IPC分类号： H04H60/23 , H04N21/266 , H04N21/4623
CPC分类号： H04H60/23 , H04N21/26606 , H04N21/4623
摘要： There is described a proxy module for use in a head-end. The head-end comprises an entitlement control message (ECM) generator arranged to generate ECMs. The head-end further comprises an encryption module arranged to encrypt content using a control word. The proxy module is arranged to: access a content control word; use the ECM generator to generate a content ECM including the content control word; generate a supplementary control word; use the ECM generator to generate a supplementary ECM including the supplementary control word; use the encryption module to encrypt the content ECM using the supplementary control word; and use the encryption module to encrypt content using the content control word. A corresponding method of providing encrypted content is also provided. There is also described a proxy module for use in a receiver arranged to receive entitlement control messages (ECMs) and encrypted content. The receiver comprises a secured module arranged to process an ECM so as to provide a control word. The receiver further comprises a decryption module arranged to decrypt encrypted content using a control word. The proxy module is arranged to: use the secured module to obtain a supplementary control word from a supplementary ECM; use the supplementary control word in the decryption module to obtain a content ECM from an encrypted version of the content ECM; use the secured module to obtain a content control word from the content ECM; and use the content control word in the decryption module to decrypt encrypted content. A corresponding method of enabling a receiver to access encrypted content is also provided.
摘要翻译：描述了用于头端的代理模块。头端包括布置成产生ECM的授权控制消息（ECM）生成器。前端还包括被配置为使用控制字加密内容的加密模块。所述代理模块被配置为：访问内容控制字; 使用ECM发生器生成包含内容控制字的内容ECM; 产生补充控制字; 使用ECM发生器生成包括补充控制字的补充ECM; 使用加密模块使用补充控制字加密内容ECM; 并使用加密模块使用内容控制字加密内容。还提供了提供加密内容的相应方法。还描述了一种代理模块，用于接收被配置为接收授权控制消息（ECM）和加密内容的接收器。所述接收机包括被安排为处理ECM以便提供控制字的安全模块。所述接收机还包括解密模块，其被配置为使用控制字对加密的内容进行解密。代理模块被设置为：使用安全模块从补充ECM获得补充控制字; 使用解密模块中的辅助控制字从内容ECM的加密版本获得内容ECM; 使用安全模块从内容ECM获取内容控制字; 并使用解密模块中的内容控制字解密加密的内容。还提供使得接收机能够访问加密的内容的相应方法。

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