Preventing unauthorized distribution of media content within a global network

• US 7,584,353 B2
• Filed: 09/12/2003
• Issued: 09/01/2009
• Est. Priority Date: 09/12/2003
• Status: Expired due to Fees

• Current Assignee: Music Public Broadcasting, Inc.
• Original Assignee: Trimble Navigation Limited (Trimble Inc.)
• Inventors: Risan, Hank, Fitzgerald, Edward Vincent
• Primary Examiner(s): Zand, Kambiz
• Assistant Examiner(s): GEE, JASON KAI YIN
• Application Number:
  US10/661,047
• Publication Number:
  US 20050060542A1
• Time in Patent Office: 2,181 Days
• Field of Search: 713/165, 713/164, 726/6
• US Class Current: 713/164
• 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 2221/2117 User registration
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management
• CPC Class Codes: H04L 63/0435 wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption cryptographic mechanisms or cryptographic arrangements for symmetric key encryption H04L9/06
• CPC Class Codes: H04L 63/062 for key distribution, e.g. centrally by trusted party cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

One embodiment of the invention is a method for providing media content while preventing its unauthorized distribution. The method includes transmitting from a client to an administrative node a request for delivery of an instance of media content (IMC); determining which content source (CS) of a plurality of CSs to provide delivery of the IMC, provided the client is authorized to receive the IMC; transmitting to the client an access key and a location of the IMC; transmitting from the client to the CS a second request and the access key; in response to receiving the second request and the access key, transferring the IMC from the CS to the client; transmitting from the client to the administrative node an indicator indicating a successful transfer of the IMC; and generating a transaction applicable to the client and associated with the transfer of the IMC to the client.

Claims

1. A method for preventing unauthorized recording of media content, said method comprising:

transmitting from a client node to an administrative node a request for delivery of an instance of media content;

determining which content source of a plurality of content sources to provide delivery of said instance of media content, provided said client node is authorized to receive said instance of media content;

transmitting to said client node an access key and a location of said instance of media content of said content source;

transmitting from said client node to said content source a second request and said access key;

in response to receiving said second request and said access key, transferring said instance of media content from said content source to said client node, said instance of media content being transferred in an unencrypted format;

activating a compliance mechanism upon receiving said instance of media content, said compliance mechanism for enforcing compliance with a usage restriction applicable to said instance of media content in response to said client node receiving said instance of media content in said unencrypted format;

controlling a data path of a kernel-mode media device driver of said client node with said compliance mechanism by diverting a first data pathway used by said media content present application to a second data pathway governed by said compliance mechanism; and

directing every said instance of media content received at said client system in said unencrypted format from said kernel-mode media device driver to a media device driver coupled with said compliance mechanism, via said second data pathway governed by said compliance mechanism, for selectively restricting output of said instance of media content.

2. The method as recited in claim 1, wherein said determining which content source of said plurality of content sources to provide delivery of said instance of media content further comprises:

determining which content source of said plurality of content sources is nearest to the physical location of said client node.

3. The method as recited in claim 1, wherein said determining which content source of said plurality of content sources to provide delivery of said instance of media content further comprises:

determining which content source of said plurality of content sources contains said instance of media content.

4. The method as recited in claim 1, wherein said access key is a time sensitive access key that becomes obsolete after a defined amount of time.

5. The method as recited in claim 1, wherein said location of said instance of media content comprises an address.

6. The method as recited in claim 5, further comprising:

changing said address after said transferring said instance of media content from said content source to said client node.

7. The method as recited in claim 1, further comprising:

preventing said instance of media content from being returned from said kernel-mode media device driver to a recording application coupled to said client node when recording said instance of media content violates a usage restriction applicable to said instance of media content.

8. The method as recited in claim 1, further comprising:

allowing said media content to be returned from said kernel-mode device driver to a recording application coupled to said client system when recording said instance of media content complies with a usage restriction applicable to said instance of media content.

9. The method as recited in claim 1, further comprising:

restricting said client node to have said media device driver implemented as a default media device driver.

10. The method as recited in claim 1, further comprising:

accessing an indicator associated with said instance of media content for indicating to said compliance mechanism a usage restriction applicable to said media content.

11. The method as recited in claim 1, wherein said kernel-mode media device driver is part of an operating system operable on said client system.

12. The method as recited in claim 1 further comprising:

altering said compliance mechanism present on said client node from a content source of said plurality of content sources in response to a change in a usage restriction comprising a copyright restriction or licensing agreement applicable to said instance of media content.

13. A method of preventing unauthorized recording of media content, wherein said method comprising:

transmitting from a client system to an administrative system a request for delivery of an instance of media content;

determining which content source of a plurality of content sources to provide delivery of said instance of media content, provided said client system is authorized to receive said instance of media content;

transmitting to said client system an access key and a location of said instance of media content of said content source;

transmitting from said client system to said content source a second request and said access key;

in response to receiving said second request and said access key, transferring said instance of media content from said content source to said client system, said instance of media content being transferred in an unencrypted format;

activating a compliance mechanism upon receiving said instance of media content, said compliance mechanism for enforcing compliance with a usage restriction applicable to said instance of media content in response to receiving said instance of media content in said unencrypted format;

controlling a data output path of said client system with said compliance mechanism by diverting a first data pathway used by the media content presentation application to a second data pathway governed by said compliance mechanism; and

directing every said instance of media content received at said client system in said unencrypted format to a custom media device coupled to said compliance mechanism via said second data output pathway governed by said compliance mechanism, for selectively restricting output of said instance of media content.

14. The method as recited in claim 13, wherein said determining which content source of said plurality of content sources to provide delivery of said instance of media content further comprises:

determining which content source of said plurality of content sources is nearest to the physical location of said client system.

15. The method as recited in claim 13, wherein said determining which content source of said plurality of content sources to provide delivery of said instance of media content further comprises:

determining which content source of said plurality of content sources contains said instance of media content.

16. The method as recited in claim 13, wherein said access key is a time sensitive access key that becomes obsolete after a defined amount of time.

17. The method as recited in claim 13, wherein said location of said instance of media content comprises an address.

18. The method as recited in claim 17, further comprising:

changing said address after said transferring said instance of media content from said content source to said client system.

19. The method as recited in claim 13, wherein said instance of media content comprises a digital watermark or an embedded key.

20. The method as recited in claim 13, further comprising:

preventing a recording application coupled to said client system from recording said instance of media content when said recording violates a usage restriction applicable to said instance of media content.

21. The method as recited in claim 13, further comprising:

allowing a recording application coupled to said client system to record said instance of media content when said recording complies with a usage restriction applicable to said instance of media content.

22. The method as recited in claim 13, further comprising:

restricting said client system to have said custom media device as a default media device.

23. The method as recited in claim 13, further comprising:

accessing an indicator associated with said instance of media content indicating to said compliance mechanism a usage restriction applicable to said media content.

24. The method as recited in claim 13, wherein said custom media device is an emulation of a custom media driver.

25. The method as recited in claim 13, further comprising:

altering said compliance mechanism present on said client system from a content source of said plurality of content sources in response to a change in a usage restriction comprising a copyright restriction or licensing agreement applicable to said instance of media content.