System and method for the propagation of DRM protected content

• US 20060259982A1
• Filed: 12/30/2005
• Published: 11/16/2006
• Est. Priority Date: 05/11/2005
• Status: Active Grant

• Current Assignee: R2 Solutions LLC (Acacia Research Corporation)
• Original Assignee: Yahoo! Inc. (Apollo Global Management, Inc.)
• Inventors: Upendran, Manish
• Granted Patent: US 7,770,229 B2
• Time in Patent Office: Days
• US Class Current: 726/27
• 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: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• CPC Class Codes: H04L 9/08 Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords network architectures or network communication protocols for supporting key management in a packet data network H04L63/06

Abstract

The present invention may be utilized for the distribution of content items protected according to various digital rights management platforms. According to one embodiment, a method for the propagation of DRM protected content to one or more devices connected to a network comprises generating a request for DRM protected content from a requesting device and streaming the requested DRM protected content from a content source as a protected DRM stream. The protected DRM stream is re-encrypted for streaming to the requesting device. The re-encrypted protected DRM stream is decrypted for playback on the requesting device.

Claims

1. A method for the propagation of DRM protected content to one or more devices connected to a network, the method comprising:

generating a request for DRM protected content from a requesting device;

streaming the requested DRM protected content from a content source as a protected DRM stream;

re-encrypting the protected DRM stream;

streaming the re-encrypted protected DRM stream to the requesting device; and

decrypting the re-encrypted protected DRM stream for playback on the requesting device.

2. The method of claim 1 wherein generating comprising generating a request by a client device.

3. The method of claim 2 wherein generating comprises generating a request by a digital media adapter.

4. The method of claim 1 wherein streaming content comprises streaming in accordance with Windows Media DRM.

5. The method of claim 1 wherein streaming comprises determining if a valid license exists to provide access to the protected DRM stream.

6. The method of claim 5 wherein determining comprises querying a license server for a valid license.

7. The method of claim 5 comprising:

generating an error message where a valid license does not exist to provide access to the protected DRM stream; and

displaying the error message on a client device.

8. The method of claim 1 wherein streaming comprises streaming to a local PC.

9. The method of claim 1 comprising:

receiving a public key from the requesting device; and

re-encrypting the protected DRM stream using the received public key.

10. The method of claim 1 comprising streaming the re-encrypting protected DRM stream in accordance with Windows Media DRM—

Network Device.

11. The method of claim 1 wherein streaming the re-encrypting protected DRM stream comprises streaming from a local PC to a digital media adapter.

12. The method of claim 1 wherein decrypting comprises using a private key from the requesting device to decrypt the re-encrypted protected DRM stream

13. The method of 12 comprising:

determining if the private key matches a public key used to re-encrypt the protected DRM stream; and

if the private key matches the public key, decrypting the re-encrypted protected DRM stream; and

if the private key does not match the public key, generating an error message for display on a client device.