The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2022
Filed:
Feb. 02, 2018
Nagravision S.a., Cheseaux-sur-Lausanne, CH;
Didier Hunacek, Cheseaux-sur-Lausanne, CH;
Herve Goupil, Cheseaux-sur-Lausanne, CH;
NAGRAVISION S.A., Cheseaux-sur-Lausanne, CH;
Abstract
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.