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1. 发明公开

EP2999230A1 VIDEO RESOLUTION ENFORCEMENT AND OPTIMIZATION IN AN ADAPTIVE BITRATE ENVIRONMENT 无效
标题翻译：欧洲最新的印度尼西亚新西兰印度尼西亚
公开(公告)号：EP2999230A1
公开(公告)日：2016-03-23
申请号：EP15185793.5
申请日：2015-09-18
申请人： Comcast Cable Communications, LLC
发明人： Park, Kyong , Fahrny, James W.
IPC分类号： H04N21/2343 , H04N21/254 , H04N21/4627
CPC分类号： H04L65/602 , G06F21/10 , G06F2221/0744 , G06Q2220/16 , H04N19/127 , H04N19/154 , H04N19/187 , H04N19/192 , H04N21/23439 , H04N21/2541 , H04N21/4627
摘要： Methods and systems related to authoring and acquiring digital rights management (DRM) licenses are disclosed. For example, a computing device may generate or author a digital rights management license for a content asset that includes one or more usage restriction rules. A usage restriction may limit the maximum display resolution for a content asset. Another device may then receive the license and process the one or more usage restrictions prior to presentation of the content asset to a user.
摘要翻译：披露与创作和获取数字版权管理（DRM）许可证相关的方法和系统。例如，计算设备可以生成或创建包括一个或多个使用限制规则的内容资产的数字版权管理许可。使用限制可能限制内容资源的最大显示分辨率。然后，另外的设备可以在向用户呈现内容资产之前接收许可证并处理一个或多个使用限制。

2. 发明授权

EP2437461B1 KEY DERIVATION FOR SECURE COMMUNICATIONS 有权
标题翻译：安全通信的关键推论
公开(公告)号：EP2437461B1
公开(公告)日：2018-05-02
申请号：EP11182311.8
申请日：2011-09-22
申请人： Comcast Cable Communications LLC
发明人： Fahrny, James W. , Kuykendall, Pete , Davoust, Nancy
IPC分类号： H04L29/06 , G11B20/00
CPC分类号： H04L63/06 , G11B20/0021 , G11B20/00478 , H04L9/30 , H04L63/068 , H04L2463/061 , H04L2463/101
摘要： A security system is disclosed in which a device-specific key value is provided to a security processing device, and then used to derive additional derived keys for use in secured communications. In response to identifying a compromise of the derived keys, the system can be instructed to derive new or replacement derived keys for use in the secured communications. In some embodiments, the security system can be used in a video reception device, to decrypt encrypted video content.

3. 发明公开

EP2560341A2 Authentication and binding of multiple devices 审中-公开
标题翻译： Authentifizierung und Verbindung mehrerer Vorrichtungen
公开(公告)号：EP2560341A2
公开(公告)日：2013-02-20
申请号：EP12180390.2
申请日：2012-08-14
申请人： Comcast Cable Communications, LLC
发明人： Fahrny, James W. , Park, Kyong
IPC分类号： H04L29/06 , H04L12/22
CPC分类号： H04L9/3247 , H04L63/08 , H04L63/0884 , H04L63/102 , H04L63/105 , H04L63/126
摘要： Systems and methods are described that relate to authentication and/or binding of multiple devices with varying security profiles. In one aspect, a first device with a higher security profile may vouch for the authenticity of a second device with a lower security profile when the second device requests access for content from a content provider. The vouching process may be implemented by allowing the first device to overlay its digital signature on a registration request that has been signed and transmitted by the second device. The second device with the lower security profile may access content from the content provider or source for a predetermined time period, even when the second device does not access content through the first device.
摘要翻译：描述了涉及具有不同安全简档的多个设备的认证和/或绑定的系统和方法。在一个方面，当第二设备从内容提供商请求访问内容时，具有较高安全性配置的第一设备可以保证具有较低安全性配置文件的第二设备的真实性。可以通过允许第一设备将其数字签名重叠在由第二设备签名和发送的注册请求上来实现加密过程。具有较低安全性配置的第二设备可以在预定时间段内从内容提供商或源访问内容，即使当第二设备不通过第一设备访问内容时。

4. 发明授权

EP2221742B1 Authenticated communication between security devices 有权转让
标题翻译：安全设备之间的认证通信
公开(公告)号：EP2221742B1
公开(公告)日：2016-12-21
申请号：EP10151361.2
申请日：2010-01-22
申请人： Comcast Cable Communications, LLC
发明人： Fahrny, James W. , Davoust, Nancy L.
IPC分类号： G06F21/10
CPC分类号： H04L63/126 , G06F21/10 , H04L9/321 , H04L63/105 , H04L2463/101 , H04N7/1675 , H04N21/2541 , H04N21/4367 , H04N21/443 , H04N21/4627 , H04N21/8166 , H04N21/8193
摘要： Apparatuses, computer readable media, and methods establishing and maintaining trust between security devices for distributing media content are provided. Two security devices bind to establish an initial trust so that security information can be exchanged. Subsequently, trust is refreshed to verify the source of a message is valid. In an embodiment, the security devices may comprise a security processor and a system on a chip (SoC) in a downloadable conditional access system. Trust may be refreshed by a security device inserting authentication information in a message to another security device, where authentication information may assume different forms, including a digital signature (asymmetric key) or a hash message authentication code (HMAC). Trust may also be refreshed by extracting header information from the message, determining state information from at least one parameter contained in the header information, and acting on message content only when the state information is valid.

5. 发明公开

EP2560341A3 Authentication and binding of multiple devices 审中-公开
标题翻译：认证和多个设备的连接
公开(公告)号：EP2560341A3
公开(公告)日：2013-06-12
申请号：EP12180390.2
申请日：2012-08-14
申请人： Comcast Cable Communications, LLC
发明人： Fahrny, James W. , Park, Kyong
IPC分类号： H04L29/06 , H04L12/22
CPC分类号： H04L9/3247 , H04L63/08 , H04L63/0884 , H04L63/102 , H04L63/105 , H04L63/126
摘要： Systems and methods are described that relate to authentication and/or binding of multiple devices with varying security profiles. In one aspect, a first device with a higher security profile may vouch for the authenticity of a second device with a lower security profile when the second device requests access for content from a content provider. The vouching process may be implemented by allowing the first device to overlay its digital signature on a registration request that has been signed and transmitted by the second device. The second device with the lower security profile may access content from the content provider or source for a predetermined time period, even when the second device does not access content through the first device.

6. 发明公开

EP2437461A1 Key derivation for secure communications 有权
标题翻译： Schlüsselableitungfürsichere Kommunikationen
公开(公告)号：EP2437461A1
公开(公告)日：2012-04-04
申请号：EP11182311.8
申请日：2011-09-22
申请人： Comcast Cable Communications LLC
发明人： Fahrny, James W. , Kuykendall, Pete , Davoust, Nancy
IPC分类号： H04L29/06 , G11B20/00
CPC分类号： H04L63/06 , G11B20/0021 , G11B20/00478 , H04L63/068 , H04L2463/061 , H04L2463/101
摘要： A security system is disclosed in which a device-specific key value is provided to a security processing device, and then used to derive additional derived keys for use in secured communications. In response to identifying a compromise of the derived keys, the system can be instructed to derive new or replacement derived keys for use in the secured communications. In some embodiments, the security system can be used in a video reception device, to decrypt encrypted video content.
摘要翻译：公开了一种安全系统，其中将设备专用密钥值提供给安全处理设备，然后用于导出用于安全通信中的附加导出密钥。响应于识别导出的密钥的折中，可以指示系统导出用于安全通信中的新的或替换的导出密钥。在一些实施例中，可以在视频接收设备中使用安全系统来解密加密的视频内容。

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