New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of digital rights management. Assigned to Qualcomm, the first patent addresses techniques for video content tracking. Assigned to Canon (JP), the second patent addresses a management device that manages trust relationship information between service providing devices and trust relationship information between a holding device and a service providing device.
9,369,754, "Video content tracking," assigned to Qualcomm.
Disclosed is an apparatus and method to determine usage rules for video content by buffer tracking. A computing device may include a secure processor configured to: store digital rights management (DRM) rules associated with a DRM key and usage rules for a session; command a cryptoprocessor to decrypt video content with the DRM key and to log an output buffer designation of the command to decrypt the video content. The secure processor may command a buffer tracking table to store the output buffer designation of the cryptoprocessor of the command to decrypt and the associated usage rules and a plurality of input and output buffer designations from a plurality of video content drivers, such that, based upon a buffer designation from an output driver to display video content received by the secure processor, the secure processor may determine usage rules to be applied to the decrypted video content for display.
9,369,489, "Management device, management system, control method, and storage medium," assigned to Canon Kabushiki Kaisha (JP).
Provided is a management device that manages trust relationship information between service providing devices and trust relationship information between a holding device and a service providing device. When the management device determines, based on the acquired trust relationship information, that a second service providing device trusts a first service providing device, the holding device trusts the first service providing device, and the holding device trusts the second service providing device, the management device sets a transfer of access rights to the holding device held by the first service providing device to the second service providing device.