CONTENT PROTECTION INTEROPERRABILITY

• US 20100212016A1
• Filed: 02/18/2009
• Published: 08/19/2010
• Est. Priority Date: 02/18/2009
• Status: Abandoned Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Reneris, Kenneth S., Simmons, John C., Dubhashi, Kedarnath A.
• Application Number:
  US12/388,285
• Publication Number:
  US 20100212016A1
• Time in Patent Office: Days
• US Class Current: 726/26
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/57 Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
• CPC Class Codes: G06F 2221/2105 Dual mode as a secondary aspect
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

Various embodiments provide content protection interoperability techniques which support secure distribution of content for multiple content protection technologies. In one or more embodiments a source digital rights management (DRM) system can associate trust data with content to be exported to a target digital rights management (DRM) system. The trust data describes a trust state for the content to enable the target DRM system to maintain the trust state for the exported content. In at least some embodiments, the source DRM system can also associate tracing data with the content to, in the event of a breach in the chain of trust, enable an identification to be made of a source of the exported content and/or a party responsible for exporting the content.

Claims

1. A computer-implemented method comprising:

ascertaining a trust state corresponding to content received from a content source for use with a source content protection technology;

mapping the trust state to a target content protection technology using trust data to define the trust state; and

exporting the content having the trust data to enable the trust state to be maintained in the target content protection technology.

2. The method of claim 1, wherein the ascertaining comprises determining whether the content source is trusted or un-trusted to define the trust state.

3. The method of claim 1, wherein exporting comprises communicating the content over a network to a target system that employs the target content protection technology.

4. The method of claim 1, wherein exporting comprises recording the content to storage media in a format compatible with the target content protection technology.

5. The method of claim 1, wherein mapping comprises:

determining the target content protection technology responsive to an export operation;

formatting the trust data based on the ascertained trust state corresponding to the source content protection technology in a format compatible with the target content protection technology.

6. The method of claim 1, further comprising associating the content with tracing data configured to enable identification of one or more parties in a chain of distribution corresponding to the content.

7. The method of claim 1, wherein the source content protection technology and the target content protection technology are different from one another.

8. One or more computer-readable storage media storing instructions that, when executed by a computing device, cause the computing device to:

ascertain a trust state for content received from a content source employing a source content protection technology based upon trust data associated by the content source with the content; and

maintain the established trust state for interaction with content at the computing device using a target content protection technology.

9. The computer-readable storage medium of claim 8 further storing instructions that, when executed by the computing device, cause the computing device to receive the content exported from the content source in an Advanced Access Content System (AACS) compliant format.

10. The computer-readable storage medium of claim 8, further storing instructions that, when executed by the computing device, cause the computing device to receive the trust data from the content source, the trust data being configured by the content source to transfer the trust state from the source content protection technology to the target content protection technology.

11. The computer-readable storage medium of claim 8, further storing instructions that, when executed by the computing device, cause the computing device to determine whether the trust state indicates that the content is trusted or un-trusted.

12. The computer-readable storage medium of claim 8, further storing instructions that, when executed by the computing device, cause the computing device to determine that the trust state corresponds to trusted content and enable interaction with the content at the computing device.

13. The computer-readable storage medium of claim 8, further storing instructions that, when executed by the computing device, cause the computing device to determine that the trust state corresponds to un-trusted content and restrict interaction with the content at the computing device.

14. A system comprising:

one or more processors;

one or more computer-readable storage media;

one or more program modules embodied on the one or more computer-readable storage media and configured to;

generate trust data for content to transfer a trust assertion corresponding to a source content protection technology to a target content protection technology;

associate the content with tracing data configured to facilitate tracking of the trust assertion; and

output the content having the trust data and the tracing data to enable protected interaction with the content through operation of the target content protection technology.

15. The system of claim 14, wherein the tracing data comprises a public key associated with a source of the trust assertion to enable identification of the source.

16. The system of claim 14, wherein the tracing data comprises a licensee identifier of an entity licensed to export content in an Advanced Access Content System (AACS) compliant recording format.

17. The system of claim 14, wherein at least one of the source content protection technology or the target content protection technology is Advanced Access Content System (AACS).

18. The system of claim 14, wherein to output comprises communicating the content over a network to a target computing device configured to record the content on one or more forms of computer-readable storage media.

19. The system of claim 14, wherein to output comprises burning the content to storage media.

20. The system of claim 14, wherein to output comprises streaming the content over a network to a target computing device configured to playback the content substantially in real-time.