System and method for relicensing content

• US 8,738,537 B2
• Filed: 10/03/2005
• Issued: 05/27/2014
• Est. Priority Date: 11/21/2003
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Hug, Joshua D.
• Primary Examiner(s): Hewitt, II, Calvin L
• Assistant Examiner(s): Le, Nancy Loan
• Application Number:
  US11/242,341
• Publication Number:
  US 20060085352A1
• Time in Patent Office: 3,158 Days
• Field of Search: 705/59
• US Class Current: 705/59
• CPC Class Codes: G06F 21/105 Arrangements for software license management or administration, e.g. for managing licenses at corporate level
• CPC Class Codes: G06F 21/1078 Logging; Metering
• CPC Class Codes: G06F 21/556 involving covert channels, i.e. data leakage between processes inhibiting the analysis of circuitry or operation with measures against power attack G06F21/755
• CPC Class Codes: G06F 21/602 Providing cryptographic facilities or services
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: H04N 21/25816 involving client authentication restricting access to computer systems by authenticating users using a predetermined code G06F21/33; cryptographic authentication protocols H04L9/32; networks authentication protocols H04L63/08; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/4108 characterised by an identification number or address, e.g. local network address protecting specific internal or external computer components using identification number G06F21/73; network arrangements, protocols or services for addressing or naming H04L61/00
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/44204 Monitoring of content usage, e.g. the number of times a movie has been viewed, copied or the amount which has been watched monitoring of user activities for profile generation for accessing a video database G06F16/739; protecting generic digital content where the protection is independent of the precise nature of the content G06F21/10; arrangements for monitoring the use made of the broadcast services in broadcast systems H04H60/31
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/6334 for authorisation, e.g. by transmitting a key wireless communications network key management H04W12/04; wireless communications network access security H04W12/08
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications

Abstract

A method of relicensing digital encrypted radio media content transmitted via a network and received by a user electronic device includes receiving a request to relicense an encrypted digital media data file included within digital encrypted radio media content. The encrypted digital media data file is retrieved from the digital encrypted radio media content stored in a memory of the user electronic device. The encrypted digital media data file is decrypted using a radio encryption key to generate an unbound digital media data file. The unbound digital media data file is bound with the user electronic device to generate a bound encrypted digital media data file. The bound encrypted digital media data file is stored in the memory of the user electronic device.

Claims

1. A method of changing a license for media content transmitted via a network and received by a user electronic device, the method comprising:

receiving, using a processor, a request to change a license for a digital media data file encrypted using a content encryption key from a first license to a second license, the first and second licenses selected from the group consisting of licenses associated with streaming radio media content, licenses associated with subscription downloads, and licenses associated with purchased downloads, wherein the first license is distinct from the second license;

retrieving, using the processor, the content encryption key of the digital media data file, the content encryption key being encrypted using a first encryption key stored on the user electronic device and associated with the first license;

decrypting, using the processor, the content encryption key using the first encryption key;

in response to decrypting the content encryption key, transmitting over a network a record of decryption to a remote computing device communicatively coupled to the user electronic device; and

encrypting, using the processor, the content encryption key of the digital media data file using a second, different encryption key stored on the user electronic device and associated with the second license.

2. The method of claim 1, wherein the digital media data file comprises an audio track, wherein receiving the request to change the license comprises receiving the request to change the license for the audio track.

3. The method of claim 1, further comprising:

receiving the first encryption key from a remote computing device via the network.

4. The method of claim 1, further comprising:

receiving a plurality of encrypted digital media data files and a rendering sequence for the plurality of digital media data files from a remote computing device, each of the plurality of digital media data files being encrypted using a different respective content encryption key.

5. The method of claim 4, wherein receiving the rendering sequence comprises receiving a rendering sequence defined without active input from a user of the user electronic device representing a choice of content to be played.

6. The method of claim 1, wherein receiving the request to change the license of the digital media data file comprises receiving a request transmitted in response to receipt of an indication by a user of the user electronic device.

7. The method of claim 1, wherein receiving the request to change the license for the digital media data file comprises receiving the request to change the license for a digital media data file stored on a storage area of a memory of the user electronic device that is not directly accessible by a user of the user electronic device.

8. The method of claim 1, further comprising:

storing the digital media data file within a storage area of a memory of the user electronic device that is accessible by a user of the user electronic device.

9. The method of claim 1, further comprising:

locating, based on location information, within a memory of the user electronic device, a plurality of chunk files that constitute the digital media data file;

retrieving the plurality of chunk files from the memory; and

processing the plurality of chunk files to generate the digital media data file.

10. The method of claim 9, wherein the location information includes a memory location algorithm and wherein locating comprises locating based on the memory location algorithm.

11. The method of claim 9, wherein the location information includes at least one of a seed content list, a radio playlist, and a mapping file and wherein locating comprises locating based on at least one of the seed content list, the radio playlist, and the mapping file.

12. The method of claim 11, wherein the location information includes the radio playlist, wherein the radio playlist defines a rendering sequence for a plurality of digital media data files that is compliant with The Digital Millennium Copyright Act, and wherein locating comprises locating based on the radio playlist.

13. The method of claim 11, wherein the location information includes the radio playlist, wherein the radio playlist defines a rendering sequence for a plurality of digital media data files that is compliant with American Society of Composers, Authors, and Publishers (ASCAP) policies, and wherein locating comprises locating based on the radio playlist.

14. The method of claim 11, wherein the location information includes the radio playlist, wherein the radio playlist defines a rendering sequence for a plurality of digital media data files that is compliant with Broadcast Music, Inc. (BMI) policies, and wherein locating comprises locating based on the radio playlist.

15. The method of claim 9, wherein retrieving the plurality of chunk files comprises retrieving at least two chunk files of the plurality of chunk files that were combined to generate at least two modified chunk files.

16. The method of claim 15, wherein processing the plurality of chunk files includes:

processing the at least two modified chunk files to generate the at least two of the plurality of chunk files.

18. The method of claim 1, wherein the first encryption key and the second, different encryption key are selected from a group consisting of a radio encryption key and a user encryption key.

17. A non-transitory computer readable medium storing a computer program product comprising executable instructions which, when executed by a processor, cause the processor to perform operations comprising:

receiving a request to change a license for a digital media data file, wherein the digital media data file is encrypted by a content encryption key from a first license to a second license, the first and second licenses selected from the group consisting of licenses associated with streaming radio media content, licenses associated with subscription downloads, and licenses associated with purchased downloads, wherein the first license is distinct from the second license;

retrieving the content encryption key of the digital media data file, the content encryption key encrypted by a first encryption key stored on the user electronic device and associated with the first license;

decrypting the content encryption key using the first encryption key;

in response to decrypting the content encryption key, transmitting a record of decryption to a remote computing device when the user computing device is communicatively coupled to the remote computing device, and storing, in a memory of the user electronic device, the record of decryption when the user electronic device is not communicatively coupled to the remote computing device; and

encrypting the content encryption key of the digital media data file using a second, different encryption key stored on the user electronic device and associated with the second license.