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1. 发明授权

US11436350B2 Protecting media content 有权
公开(公告)号：US11436350B2
公开(公告)日：2022-09-06
申请号：US16484343
申请日：2018-02-02
申请人： NAGRAVISION S.A.
发明人： Didier Hunacek , Herve Goupil
IPC分类号： G06F21/60 , G06F21/10 , H04L9/08 , H04L9/32 , H04L9/40 , H04N21/4408 , H04N21/4627
摘要： Content source and sink devices and methods help to guard against compromising security of content transferred from a source device to a sink device, for example where a primary encryption mechanism protecting the content has been compromised. A content source device is configured to connect to a content sink device to transmit digital media content to the content sink device. The content source device includes a connection module configured to establish a connection to the sink device, encrypt a digital media content for transmission across the connection with a first cipher using a connection key, and transmit the encrypted digital media content to the sink device over the connection. The content source also includes a protection module configured to prevent the sink device from using the digital media content without authorisation. The protection module receives a digital certificate identifying the sink device, verifies the digital certificate, and determines if the digital certificate identifies a sink device authorised to receive digital media content over the connection. If the determination is positive, the protection module enables the sink device to use the digital media content.

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