New patent applications are published by the USPTO on Thursdays. Both of today's Spotlight Applications concern aspects of digital rights management. Assigned to Azuki Systems, the first application discloses techniques for media client device authentication using hardware root of trust. Assigned to Verance, the second application discloses techniques for screening architectures enabling revocation and update.
20160162669, "Media client device authentication using hardware root of trust," assigned to Azuki Systems, Inc.
A client device for media playback includes a user-installable media client application which implements the client-side of a digital rights management (DRM) system. The client device employs secure boot and verifies the user-installed application. The application is hardened against reverse engineering, and it utilizes a special API provided by the client device to tie into the secure boot, bridging the gap between the secure boot and the client-side of the DRM system contained within the application.
20160162858, "Screening architectures enabling revocation and update," assigned to Verance.
Methods, devices, systems and computer program products are provided to facilitate signaling of digital rights management (DRM) information that is carried within a multimedia content as digital watermarks. The embedded watermarks enable signaling of a change in trustworthiness of particular DRM technology, enable addition of new DRM technologies to a trusted list of technologies, and facilitate revocation of obsolete or untrustworthy technologies. Once a content is received at a receiver that is equipped with a watermark extractor, extraction of watermark symbols from the content allows the determination of change in trustworthiness of DRM technologies associated with the content.