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1.发明公开Conditional entitlement processing for obtaining a control word 有权Bedingungsberechtigungsverarbeitung zum Erhalten eines Kontrollwortes
公开(公告)号：EP2227015A2
公开(公告)日：2010-09-08
申请号：EP10154151.4
申请日：2010-02-19
申请人： Irdeto Access B.V.
IPC分类号： H04N7/167
CPC分类号： H04L9/14 , H04L9/0836 , H04L9/0891 , H04L2209/24 , H04L2209/60 , H04N7/163 , H04N21/26606 , H04N21/4623 , H04N21/63345
摘要： The invention provides an improved method and an improved receiver for obtaining a control word. Two or more subkeys are obtained in a receiver. Each subkey was encrypted under control of a key received in an entitlement message or transformed under control of a seed received in an entitlement message. After decryption or transformation, the subkeys are combined to obtain the control word. Typically at least one of the entitlement messages is a positive entitlement message and at least one of the entitlement messages is a negative entitlement message. The invention can be used in a conditional access system such as a Pay-TV system.
摘要翻译： 本发明提供了一种用于获得控制字的改进方法和改进的接收机。 在接收机中获得两个或多个子密钥。 每个子密钥在授权消息中接收的密钥的控制下被加密，或者在授权消息中接收的种子的控制下进行变换。 在解密或变换之后，组合子密钥以获得控制字。 通常，授权消息中的至少一个是正授权消息，并且授权消息中的至少一个是负授权消息。 本发明可以用在诸如付费电视系统之类的条件接收系统中。
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公开(公告)号：EP2227015A3
公开(公告)日：2012-06-13
申请号：EP10154151.4
申请日：2010-02-19
申请人： Irdeto Access B.V.
CPC分类号： H04L9/14 , H04L9/0836 , H04L9/0891 , H04L2209/24 , H04L2209/60 , H04N7/163 , H04N21/26606 , H04N21/4623 , H04N21/63345
摘要： The invention provides an improved method and an improved receiver for obtaining a control word. Two or more subkeys are obtained in a receiver. Each subkey was encrypted under control of a key received in an entitlement message or transformed under control of a seed received in an entitlement message. After decryption or transformation, the subkeys are combined to obtain the control word. Typically at least one of the entitlement messages is a positive entitlement message and at least one of the entitlement messages is a negative entitlement message. The invention can be used in a conditional access system such as a Pay-TV system.
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公开(公告)号：EP2227014A2
公开(公告)日：2010-09-08
申请号：EP10154150.6
申请日：2010-02-19
申请人： Irdeto Access B.V.
CPC分类号： H04L9/3234 , H04L9/0836 , H04L9/14 , H04L2209/16 , H04N7/1675 , H04N21/2347 , H04N21/26606 , H04N21/26613 , H04N21/4408 , H04N21/63345
摘要： The invention provides a system and a method for securely providing a secret data from a sender to one or more receivers. The receiver uses a sequence of functions originating from a hierarchy of functions to migrate the secret data from an input transform space to an output transform space using a mathematical transformation under control of one or more seeds. The seeds are provided to the receiver by the sender. The sender conditionally allows the receiver to obtain the secret data by controlling the seeds.
摘要翻译： 本发明提供了一种用于从发送者到一个或多个接收者安全地提供秘密数据的系统和方法。 接收机使用源自功能层级的功能序列，以使用在一个或多个种子的控制下的数学变换将秘密数据从输入变换空间迁移到输出变换空间。 种子由发送者提供给接收者。 发送者有条件地允许接收者通过控制种子来获得秘密数据。
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公开(公告)号：EP2227014A3
公开(公告)日：2012-06-13
申请号：EP10154150.6
申请日：2010-02-19
申请人： Irdeto Access B.V.
CPC分类号： H04L9/3234 , H04L9/0836 , H04L9/14 , H04L2209/16 , H04N7/1675 , H04N21/2347 , H04N21/26606 , H04N21/26613 , H04N21/4408 , H04N21/63345
摘要： The invention provides a system and a method for securely providing a secret data from a sender to one or more receivers. The receiver uses a sequence of functions originating from a hierarchy of functions to migrate the secret data from an input transform space to an output transform space using a mathematical transformation under control of one or more seeds. The seeds are provided to the receiver by the sender. The sender conditionally allows the receiver to obtain the secret data by controlling the seeds.
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