On Thursdays the USPTO publishes new patent applications. Both of today's Spotlight Applications address various aspects of DRM. Assigned to Samsung, the first application discloses techniques for getting content information when DRM agent and rendering application are implemented on separate devices. Assigned to LG Electronics, the second application discloses verifying membership for moving rights object in domain.
20080184027, "Method and apparatus for getting content information when DRM agent and rendering application are implemented on separate devices," assigned to Samsung (KR).
A method and apparatus which can reduce the communication time that occurs due to transmission of an encrypted content, when a Digital Rights Management (DRM) agent and a rendering application are implemented in different devices respectively, is provided. A method of obtaining content information in an environment where a DRM agent and a rendering application are separated from each other, includes transmitting, by a consumer electronics (CE) device comprising the rendering application, first N bytes of the content to a portable Digital Rights Management (PDRM) device comprising the DRM agent, and obtaining, by the PDRM device, information about the content by using a cryptographic hash with respect to the first N bytes, and transmitting the obtained information to the CE device.
20080184350, "Method and terminal of verifying membership for moving rights object in domain," assigned to LG Electronics (KR).
Disclosed is a Digital rights Management (DRM), and particularly a method and terminal for verifying membership in order to move Rights Object (RO) in a domain, the method implemented in a first embodiment in which a second device calculates a MAC value as a verified value to send to a first device before the first device moves a domain RO to the second device, and accordingly the first device verifies that the second device is a properly subscribed domain member to thereafter move the domain RO, and a second embodiment in which when the first device calculates a first verified value to send to a second device, the second device verifies whether the first device is a properly subscribed domain member and then calculates a second verified value to send to the first device, and the first device also verifies whether the second device is a properly subscribed domain member to thereafter send the domain RO to the second device. The present invention allows the domain RO to be moved in the domain only between devices which properly belong to the domain, such that a problem in security, which may occur when moving the domain RO without verifying whether a device to receive the domain RO moved is the properly subscribed domain member upon the movement of the domain RO between the devices, can be avoided