Distributed media-protection systems and methods to operate the same

• US 9,178,693 B2
• Filed: 08/04/2006
• Issued: 11/03/2015
• Est. Priority Date: 08/04/2006
• Status: Active Grant

• Current Assignee: DIRECTV, LLC (AT&T, Inc.)
• Original Assignee: The DIRECTV Group, Inc. (AT&T, Inc.)
• Inventors: Ficco, Michael H.
• Primary Examiner(s): Baderman, Scott
• Assistant Examiner(s): AMIN, MUSTAFA A
• Application Number:
  US11/499,635
• Publication Number:
  US 20080033881A1
• Time in Patent Office: 3,378 Days
• Field of Search: 715/201
• US Class Current: 1/1
• CPC Class Codes: H04L 2209/601 Broadcast encryption
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 9/00 Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
• CPC Class Codes: H04N 21/21 Server components or server architectures
• CPC Class Codes: H04N 21/23 Processing of content or additional data; Elementary server operations; Server middleware
• CPC Class Codes: H04N 21/42684 Client identification by a unique number or address, e.g. serial number, MAC address, socket ID network arrangements, protocols or services for addressing or naming H04L61/00
• CPC Class Codes: H04N 21/4332 by placing content in organized collections, e.g. local EPG data repository interfaces, Database management systems or updating for information retrieval G06F16/23; details of retrieval of video data and associated meta data in video database G06F16/739
• CPC Class Codes: H04N 21/4402 involving reformatting operations of video signals for household redistribution, storage or real-time display details of conversion of video standards at pixel level H04N7/01; video transcoding H04N19/40; adapting incoming signals to the display format of the display terminal G09G5/005; media handling at the source in data packet switching networks H04L65/764
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 21/458 Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations arrangements for replacing or switching information during the broadcast or during the distribution H04H20/10
• CPC Class Codes: H04N 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• 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 21/632 using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices broadcast-related systems characterised by transmission among terminal devices H04H60/80; distributed application using peer-to-peer [P2P] networks H04L67/104
• CPC Class Codes: H04N 21/8456 by decomposing the content in the time domain, e.g. in time segments

Abstract

Example distributed media-protection systems and methods to operate the same are disclosed. A disclosed example method comprises receiving a media stream at a first set top box (STB) via a content delivery system, splitting, at the first STB, the received media stream into at least two portions, allocating, using a processor at the first STB, a first of the at least two portions to the first STB and a second of the at least two portions to a second STB based on a pseudorandom seed, and storing the first of the at least two portions on the first STB and the second of the at least two portions on the second STB.

Claims

1. In a content delivery system comprising a content provider and a plurality of media devices in communication with the content provider, wherein each of the plurality of media devices is associated with at least one of a plurality of subscribers, a method of providing a media stream for display, comprising the steps of:

receiving a user input in a first media device associated with a first subscriber of the plurality of subscribers and not with a second subscriber of the plurality of subscribers, the user input selecting the media stream;

receiving, responsive to the user input, the selected media stream in the first media device from the content provider;

splitting, at the first media device, the received media stream into at least two portions;

allocating, using the first media device, a first of the at least two portions to the first media device and a second of the at least two portions to a second media device associated with the second subscriber of the plurality of subscribers based upon f_crypto(N,S), wherein f_crypto(N,S) is a cryptographic combination of N and S, N is based upon a name of the media stream, and S is a pseudorandom seed;

storing the first of the at least two portions on the first media device and transmitting the second of the at least two portions from the first media device to the second media device for storage therein based upon the allocation; and

outputting the media stream from the first media device to a display device electrically coupled to the first media device, the media stream being output by the display device to present the media stream to the user.

2. The method as defined in claim 1, wherein the media stream represents at least one of a piece of media, a program, a file, a media slice or a media segment.

3. The method as defined in claim 1, wherein each of the first media device and second media device comprises at least one of a home media center, a residential gateway, a home media server, a digital video recorder, a video cassette recorder, a personal computer, a game playing console, a television, a satellite receiver, or a cable television receiver.

4. The method as defined in claim 1, wherein metadata associated with the media stream comprises an encrypted version of the pseudorandom seed, and further comprising:

extracting the encrypted pseudorandom seed from the metadata; and

decrypting the extracted encrypted pseudorandom seed.

5. The method as defined in claim 1, further comprising encrypting, at the first media device, the at least two portions before they are stored on the first media device and the second media device.

6. The method as defined in claim 1, wherein allocating the second of the at least two portions to the second media device based upon f_crypto(N S) comprises:

computing N as a first hash based upon the name of the media stream;

computing f_ctypto(N,S) as a second hash based upon the first hash and the pseudorandom seed;

modifying the second hash based upon a count of communicatively coupled media devices; and

allocating the second of the at least two portions to the second media device based upon the modified second hash.

7. The method as defined in claim 1, further comprising storing a duplicate copy of the one of the at least two portions on a redundant media device.

8. The method as defined in claim 1, further comprising notifying the second media device that the media stream was received at the first media device.

9. The method as defined in claim 1, further comprising not storing the first and second of the at least two portions when the media stream is at least one of recorded, being recorded, stored or being stored by the second media device.

10. The method as defined in claim 1, first media device consists of at least one of a set top box, a digital video recorder, a television, a satellite receiver, or a cable television receiver.

11. The method of claim 1, wherein a size of each portion is configured by the content provider.

12. In a content delivery system comprising a content provider and a plurality of media devices in communication with the content provider, wherein each of the plurality of media devices is associated with at least one of a plurality of subscribers, a method of providing a media stream for display, comprising the steps of:

receiving at a first media device associated with a first subscriber, a user selection to playback the media stream, the media stream associated with metadata comprising an encrypted version of a pseudorandom seed;

extracting the encrypted version of the pseudorandom seed from the metadata;

decrypting the encrypted version of the pseudorandom seed to determine whether the first media device is authorized to playback the media;

identifying, using the first media device, at least two media devices storing respective ones of at least two media slices of the selected media based upon f_ctypto(N,S), wherein f_crypto(N,S) is a cryptographic combination of N and S, N is based upon a name of the media stream, and S is a pseudorandom seed, wherein at least one of the at least two of the media devices storing respective ones of the at least two media slices of the selected media is associated with a second subscriber and not the first subscriber;

gathering, using the first media device, the at least two media slices from the identified at least two media devices;

combining, in the first media device, the at least two media slices to form the media stream; and

outputting the media stream from the first media device to a display device electrically coupled to the first media device, the media stream being output by the display device to present the media stream to the user.

13. The method as defined in claim 12, further comprising tracking at least one of collection, combining or playback of the media.

14. The method as defined in claim 12, wherein the media stream is only stored in volatile memory.

15. The method as defined in claim 12, further comprising decrypting the at least two media slices before they are combined.

16. The method as defined in claim 12, wherein identifying the at least two media devices based upon f_ctypto(N,S) comprises:

computing N as a first hash based upon the name of the media stream;

computing f_ctypto(N,S) as a second hash based upon the first hash and the decrypted pseudorandom seed;

modifying the second hash based upon a count of the at least two media devices; and

identifying the at least two media devices based upon the modified second hash.

17. The method as defined in claim 12, wherein at least one of the media slices is stored on the first media device.

18. The method as defined in claim 12, further comprising receiving a notification that the media was recorded by one of the at least two media devices.

19. The method as defined in claim 18, further comprising not recording the media if the notification is received.

20. The method as defined in claim 12, wherein the first media device consists of at least one of a set top box, a digital video recorder, a television, a satellite receiver, or a cable television receiver.

21. A media device for use with a content delivery system comprising a content provider and a plurality of other media devices in communication with the content provider, wherein the media device and each of the plurality of other media devices is associated with at least one of a plurality of subscribers, comprising:

a hardware input device to receive input from a first subscriber of the plurality of subscribers, the input selecting a piece of media for playback;

a distributed media module to identify a first identified media device of the plurality of other media devices, the first identified media device associated with a second subscriber and storing a first media slice of the selected piece of media based upon f_crypto(N,S), wherein f_crypt(N,S) is a cryptographic combination of N and S, N is based upon a name of the piece of media, and S is a pseudorandom seed, to identify a second identified media device of the plurality of other media devices, the second identified media device associated with a third subscriber storing a second media slice of the selected piece of media based upon f_crypt(N,S), to gather the first media slice and the second media slice from the first identified media device and the second identified media device, and combine the first identified media slice and the second identified media slice to form a media stream representative of the media;

a security device to decrypt an encrypted version of the pseudorandom seed, the encrypted version of the pseudorandom seed extracted from metadata associated with the media stream; and

a display module to output the media stream to a display device electrically coupled to the media device, the media stream being output by the display device to present the media stream to the user.

22. The media device as defined in claim 21, further comprising volatile storage to buffer the media stream.

23. The media device as defined in claim 21, further comprising a decrypter to decrypt the media slices.

24. The media device as defined in claim 21, wherein the piece of media was recorded by at least one of the first and second identified media devices, and the media device further comprises a memory to store a universal directory that lists the piece of media.

25. The media device as defined in claim 21, wherein the piece of media was recorded by the media device, and the media device further comprises a memory to store a media directory that lists the piece of media.

26. The media device as defined in claim 21, wherein the distributed media module applies forward error correction logic to adjust for at least one of ft the first identified media slice or the second identified media slice if the one of the first identified media slice or the second identified media slice is corrupted or missing media slice.

27. The media device as defined in claim 21, wherein the apparatus consists of at least one of a set top box, a digital video recorder, a television, a satellite receiver, or a cable television receiver.

28. The media device of claim 21, wherein:

N is a first hash of at least a name of the piece of media;

f_crypto(N,S) is a hash of N and S; and

the first identified media device and the second identified media device are identified based upon f_crpto(N,S) modified based upon a count of the plurality of other media devices.

29. In a content delivery system comprising a content provider and a plurality of media devices in communication with the content provider, wherein each of the media devices is associated with at least one of a plurality of subscribers, a media device comprising:

a hardware input module to receive an input from a first of the plurality of subscribers selecting a media stream;

a front end module, responsive to the input, to receive the selected media stream, wherein metadata associated with the media stream comprises an encrypted pseudorandom seed;

a security module to extract the encrypted pseudorandom seed from the metadata and to decrypt the encrypted pseudorandom seed;

a distributed media module comprising a slicer to split the received media stream into at least two portions, and to select one of the at least two portions of the media stream to be stored on a second media device associated with a second of the plurality of subscribers based upon f_crypto(N,S), wherein f_crypto(N,S) is a combination of N and S, N is based upon a name of the media stream, and S is the extracted pseudorandom seed;

a network interface to transmit the selected one of the at least two portions of the media stream to the second media device, wherein at least one of the front end module, the security module; and

a display module to output the selected media stream to a display device electrically coupled to the media device, the media stream being output by the display device to present the media stream to the user.

30. The media device as defined in claim 29, wherein the distributed media module further comprises a de-slicer and hopper to collect at least two portions of a second media stream and to determine an identification of a third media device based upon a second pseudorandom seed contained in second metadata associated with the second media stream, wherein at least one of the at least two portions of the second media stream are stored by the third media device.

31. The media device as defined in claim 29, further comprising an encrypter to encrypt the one of the at least two portions of the media stream.

32. The media device as defined in claim 29, further comprising a third media device to store a duplicate copy of the one of the at least two portions of the media stream stored at the second media device.

33. The media device as defined in claim 29, wherein the third media device is a redundant media device to mirror the second media device.

34. The media device as defined in claim 29, wherein the media device consists of at least one of a set top box, a digital video recorder, a television, a satellite receiver, or a cable television receiver.

35. The media device of claim 29, wherein:

N is a first hash of at least a name of the piece of media;

f_crypto(N,S) is a hash of N and S; and

the first identified media device and the second identified media device are identified based upon f_crypto(N,S) modified based upon a count of the plurality of other media devices.

36. A non-transitory computer-readable media storing machine accessible instructions which, when executed, cause a first media device of a plurality of media devices to:

receive input from a first subscriber of a plurality of subscribers in the first media device, the input selecting media for playback by the first media device, the media having associated metadata comprising an encrypted pseudorandom seed;

extract the encrypted pseudorandom seed from the metadata;

decrypt the encrypted pseudorandom seed;

identify, at the first media device, at least two other of the plurality of media devices associated with other of the plurality of subscribers, each storing respective ones of at least two media slices of the selected media based upon f_crypto(N,S), wherein f_crypto(N,S) is a combination of N and S, N is based upon a name of the media stream, and S is a pseudorandom seed;

gather the at least two media slices from the identified at least two of the plurality of media devices;

combine the at least two media slices to form a media stream representative of the media; and

output the media stream from the first media device to a display device electrically coupled to the first media device, the media stream being output by the display device to present the media stream to the first subscriber.

37. The non-transitory computer-readable media as defined in claim 36, wherein the machine accessible instructions, when executed, cause the first media device to only store the media stream in a volatile memory.

38. The non-transitory computer-readable media as defined in claim 36, wherein the machine accessible instructions, when executed, cause the first media device to identify the at least two other of the plurality of media devices by:

computing N as a first hash based upon the name of the media;

computing f_ctypto(N,S) as a second hash based upon the first hash and the pseudorandom seed;

modifying the second hash based upon a count of the at least two other of the plurality of media devices; and

identifying the at least two other of the plurality of media devices based upon the modified second hash.

39. The non-transitory computer-readable media as defined in claim 36, wherein the machine accessible instructions, when executed, cause the first media device to receive a notification that the media was recorded by one of the at least two media devices.

40. In a content delivery system comprising a content provider and a plurality of media receivers in communication with the content provider, a method of providing a media stream for display, comprising the steps of:

receiving a user input in a first media receiver, the user input selecting the media stream;

receiving, responsive to the user input, the selected media stream in the first media receiver from the content provider;

splitting, at the first media receiver, the received media stream into at least two portions;

allocating, using the first media receiver, a first of the at least two portions to the first media receiver and a second of the at least two portions to a second media receiver based upon f_crypto(N,S), wherein f_crypto(N,S) is a cryptographic combination of N and S, N is based upon a name of the media stream, and S is a pseudorandom seed;

storing the first of the at least two portions on the first media receiver and transmitting the second of the at least two portions from the first media receiver to the second media receiver for storage therein based upon the allocation; and

outputting the media stream from the first media device to a display device electrically coupled to the first media receiver, the media stream being output by the display device to present the media stream to the user.

41. The method of claim 40, wherein the first media receiver and the second media receiver are disposed in different residences.

42. The method as defined in claim 40, wherein allocating the second of the at least two portions to the second media device based on f_crytpo(N,S) comprises:

computing N as a first hash based upon the name of the media stream;

computing f_ctypto(N,S) as a second hash based upon the first hash and the pseudorandom seed;

modifying the second hash based upon a count of communicatively coupled media devices; and

allocating the second of the at least two portions to the second media device based upon the modified second hash.