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1. 发明授权

US10284365B2 System and method for synchronized key derivation across multiple conditional access servers 有权
公开(公告)号：US10284365B2
公开(公告)日：2019-05-07
申请号：US15885557
申请日：2018-01-31
申请人： Verimatrix, Inc.
发明人： Matthew Messerman , Thomas Handal , Matthew Fite , Gerd Mersmann
IPC分类号： H04L29/06 , H04L9/08 , H04L9/16 , H04N7/167 , H04N21/222 , H04N21/2347 , H04N21/266 , H04N21/4405 , H04N21/6334 , H04N21/835
摘要： Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier that identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.

2. 发明申请

US20180227117A1 System and Method for Synchronized Key Derivation across Multiple Conditional Access Servers 审中-公开
公开(公告)号：US20180227117A1
公开(公告)日：2018-08-09
申请号：US15885557
申请日：2018-01-31
申请人： Verimatrix, Inc.
发明人： Matthew Messerman , Thomas Handal , Matthew Fite , Gerd Mersmann
IPC分类号： H04L9/08 , H04N7/167 , H04L9/16
CPC分类号： H04L9/083 , H04L9/0833 , H04L9/0836 , H04L9/0861 , H04L9/088 , H04L9/16 , H04L2209/60 , H04N7/1675 , H04N21/222 , H04N21/2347 , H04N21/26613 , H04N21/4405 , H04N21/63345 , H04N21/835
摘要： Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier that identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.

3. 发明授权

US09887837B2 System and method for synchronized key derivation across multiple conditional access servers 有权
公开(公告)号：US09887837B2
公开(公告)日：2018-02-06
申请号：US15032039
申请日：2014-10-31
申请人： Verimatrix, Inc.
发明人： Matthew Messerman , Thomas Handal , Matthew Fite , Gerd Mersmann
IPC分类号： H04L29/06 , H04L9/08 , H04L9/16 , H04N7/167
CPC分类号： H04L9/083 , H04L9/0833 , H04L9/0836 , H04L9/0861 , H04L9/088 , H04L9/16 , H04L2209/60 , H04N7/1675 , H04N21/222 , H04N21/2347 , H04N21/26613 , H04N21/4405 , H04N21/63345 , H04N21/835
摘要： Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier than identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.

4. 发明申请

US20160254907A1 System and Method for Synchronized Key Derivation across Multiple Conditional Access Servers 有权
标题翻译：跨条件访问服务器同步密钥导出的系统和方法
公开(公告)号：US20160254907A1
公开(公告)日：2016-09-01
申请号：US15032039
申请日：2014-10-31
申请人： VERIMATRIX INC.
发明人： Matthew Messerman , Thomas Handal , Matthew Fite , Gerd Mersmann
IPC分类号： H04L9/08 , H04L9/16
CPC分类号： H04L9/083 , H04L9/0833 , H04L9/0836 , H04L9/0861 , H04L9/088 , H04L9/16 , H04L2209/60 , H04N7/1675 , H04N21/222 , H04N21/2347 , H04N21/26613 , H04N21/4405 , H04N21/63345 , H04N21/835
摘要： Systems and methods for synchronized key derivation across multiple conditional access servers are disclosed. In one embodiment, a method for synchronized key derivation to provide playback devices with derived keys for decrypting content includes receiving a request for a first derived key that includes a first asset identifier than identifies a piece of content and a first playback position within the content, determining a first content key starting position and first derived key starting position within the content using the first playback position, where the key starting positions precede the first playback position, determining whether a first content key associated with the first asset identifier and first content key starting position is stored, retrieving the first content key using the first asset identifier and first content key starting position, generating a first derived key using the first content key and first derived key starting position, and sending the derived key.
摘要翻译：公开了用于跨多个条件访问服务器的同步密钥导出的系统和方法。在一个实施例中，用于为再现设备提供用于解密内容的导出密钥的同步密钥导出的方法包括：接收对包括第一资产标识符的第一导出密钥的请求，该第一资源标识符不是识别内容内的一条内容和第一播放位置，使用第一播放位置确定内容内的第一内容密钥开始位置和第一派生密钥开始位置，其中密钥起始位置在第一重放位置之前，确定与第一资产标识符和第一内容密钥相关联的第一内容密钥是否开始存储位置，使用第一资产标识符和第一内容密钥起始位置检索第一内容密钥，使用第一内容密钥和第一派生密钥起始位置生成第一导出密钥，以及发送导出密钥。

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