PROTECTING MEDIA CONTENT

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.