Tuesdays the PTO issues new patents. Both of today's Spotlight Patents concern aspects of digital rights management and both are assigned to Samsung. The first patent concerns techniques for motion picture file encryption method and digital rights management method using the same. The second patent concerns techniques for managing digital rights management contents in portable terminal.
8,755,524, "Motion picture file encryption method and digital rights management method using the same," assigned to Samsung and to the Sejong Industry-Academy Cooperation Foundation (KR).
A method of encrypting a motion picture file and a method of digital rights management using the same, wherein encryption method includes: extracting information on the location of at least one video sample, which is a real-time streaming unit, from meta-data of the motion picture file; extracting the video samples based on the location information; encrypting the extracted video samples, excluding a start code within a video sample header of each extracted video sample, based on predetermined encryption information; and producing an encrypted motion picture file by recombining the encrypted video samples. Since the file is encrypted in units of video object planes (VOPs) while maintaining an MEPG-4 file format, the encryption method can be easily applied to a completed file format and streaming service is also possible.
8,752,205, "Apparatus and method for managing digital rights management contents in portable terminal," assigned to Samsung (KR).
Provided is an apparatus and method for managing Digital Rights Management (DRM) contents in a portable terminal. The method includes when a license of the DRM content is consumed, changing license information, which is stored in an external memory, on the DRM content; storing information relating to changed data of the external memory into an internal memory; determining whether the changed license information stored in the external memory has changed by using the information stored in the internal memory when the DRM content is used; and determining whether the DRM content is available according to whether the changed license information has changed.